Open up your mind and say, ahh...

One of the most exciting announcements from WWDC today was iOS 4, the iPhone’s new operating system.

The OS, which contains around 100 new and upgraded features, will be rolled out with the new iPhone 4 next month, and it will also be available as a free software update on earlier devices, including the iPad, iPhone 3G, iPhone 3GS, and second and third generation iPod touch with 32GB or 64GB storage.

In his keynote address, Steve Jobs chose to highlight a select few of the iOS’s new features, including multitasking, iBooks, advertising and file management. But there wasn’t enough time to cover all the upgrades and improvements. Some of iOS 4’s features that slipped under the radar include app gifting, wireless keyboard support and many others.

We first learned about iOS 4 back in April. At that point, we knew multitasking would be coming to the iPhone “in a way that doesn’t hinder performance or battery life.” Today, Jobs confirmed and demonstrated services such as Pandora and navigation running in the background while other apps were also running in the foreground.

Two other hotly anticipated upgrades for iOS 4 are the Mail app’s major facelift and the all-new app organization functionality.

Now, users can organize their iPhone apps into separate folders for better organization and easy access. iOS 4 will be able to manage up to 2160 applications on a device. Folders will feature the familiar drag-and-drop functionality that Apple device users know and love.

Email on the iPhone is also getting a major overhaul in iOS 4. You’ll be able to view messages from all your accounts in a single, integrated inbox. Messages will be threaded, and you’ll be able to open attachments using third-party apps, as well.

Apple made some significant announcements for multimedia functionality, too. iOS 4 will support custom playlist creation for iTunes, tap-to-focus video, 5x zoom for camera functions, and a Photos feature called “Faces and Places,” which allows users to sort and view photos based on where they were taken and who appears in them.

Finally, applications can now be gifted to friends and family, the background wallpaper on your home screen can be easily changed, a spell-checker has been built into Mail and other apps, and Bluetooth-enabled wireless keyboards will now play nicely with the operating system.

Apple is one of the biggest supporters of HTML5, and Steve Jobs clearly states he thinks this new web standard is the future of the web. To show what, exactly, it means by that, Apple launched a HTML5 showcase, displaying what a HTML5-capable browser can do without the need to install any additional plugins.

In typical Apple style, the showcase consists of simple, elegant, and yet quite impressive demos of this technology. In one demo, you can type in some text, quickly change the font, its size and transparency, rotate it or add a shadow effect. Another lets you browse through a horizontal, vertical or grid-shaped gallery of images, while a particularly impressive demo lets you spin a 3D object by clicking and dragging.

Apple’s message is clear: HTML5 is mature enough for wide adoption, and sites which require add-ons to display content are a thing of the past. The text on the site states: “Standards aren’t add-ons to the web. They are the web.” Yes, you can definitely cover a lot of ground that used to belong to Flash with HTML5. What Apple doesn’t tell us is that one could create a similar showcase in Flash with far more advanced effects, which are way out of reach of HTML5 and CSS3.

To try out any of the demos you’ll need to download the latest version of Safari .

We’re guessing if you have both an iPhone and an iPad then you’re a fan of Apple products, and proud of your shiny new tablet and its “mini-me” phone buddy.

So, what better way to celebrate your iPhone and its big tablet brother than with matching cases? Here we bring together five trendy options that are available for both of the devices.

Get coordinated across your entire Apple mobile portfolio with one of these paired up solutions that will give your iDevices the twin look. The Schwarzenegger/Devito twin look maybe, but a twin look nonetheless…

1. SeasideSew Handmade Fabric Cases

For the iPad

For the iPhone

If you’re the arts-and-crafts type then there’s a treasure trove of great homemade cases and sleeves to be found on Etsy. This cheerful mermaid design from California-based SeasideSew caught our eye. With bamboo padding for protection, the outer fabric is water-resistant making these a sensible, as well as sweet, option.

Cost: From $25 and from $21

2. Vers Audio Wooden Cases

For the iPad

For the iPhone

We’re big fans of Vers Audio and its policy to plant 100 trees for every one cut down, so these fabulous wooden cases crafted from bamboo and hardwoods are guilt-free, while their steel reinforced build quality should mean they’ll be the only ones you’ll need for a long, long time.

Cost: $79.99 and $39.99

3. Beautiful Skin Leather Cases

For the iPad

For the iPhone

Made from 100% kid skin (re: young goats, not actually “kids”) and cow hide, these cases offer unique graphic designs printed directly on to the leather. This results in unusual cases that are attractive and handcrafted without being too cute or too homely. This cherry blossom and swallow design is available from Etsy seller tovicorrie’s “Beautiful Skin” shop but order requests can be made for any of the many leather designs available.

Cost: $90 and $38

4. Griffin Technology FlexGrip Cases

For the iPad

For the iPhone

If you’re not the handcrafted or wood type, then Griffin Technology’s FlexGrip cases might be the option for you. They offer functional, minimalist coverings for your iPhone and iPad that protect and give better grip with absolutely no fuss whatsoever. Made of durable, non-scratching silicone, the white option is available for both devices.

Cost: $34.99 and $9.99

5. Cygnett “Glam” Cases

For the iPad

For the iPhone

These glossy, patent leather efforts are appropriately named “Glam” and will bring some high-sheen shine to both your iPhone and iPad. Inside you’ll find micro-suede to cushion your precious devices in the luxury they deservs while the screens get protected with the book-style cover for the iPad and the flip down top for the iPhone.

Cost: $69.95 and $29.95

BONUS: Uncommon Capsule Cases — Coming Soon for iPad

Uncommon offers a fabulous range of customizable shatterproof polycarbonate “capsule cases” for Apple’s iPhone (and iPod touch) with a iPad version planned for the coming months. The option to take advantage of the Uncommon’s design-your-own service that lets you upload your own images or photos to be made into a personalized case means this might be one worth waiting for.

Cost: TBC and $39.95