Apple’s new iCloud service will allow iPhone, iPod touch, and iPad users running iOS 5 and up to store their music, contacts, documents, and other data online. The service will also store a history of apps you download from the App Store and media you purchase from iTunes, allowing you to re-download items at any time.

Today Apple opened up iCloud to developers. If you have a developer account you can login at iCloud.com to kick the tires. In addition to online storage, the service provides a free “find my phone” feature which shows your phone’s physical location on a map, and a suite of web apps for email, calendar, and iWork, allowing you to view documents from your iOS device.

9 to 5 Mac has posted a series of images. Overall, the web apps look an awful lot like iPad apps, which is probably a good thing if you’re used to using iWork, Mail, and other apps on an iPad. On the other hand, if you’re not using a touch-enabled computer, the iPad look and feel might be a bit of overkill.

Users will get 5GB of storage for free, and anything purchased from iTunes doesn’t count against that limit. But if you need more space, Apple announced today that you can get an extra 10GB of data for $20 per year, 20GB extra for $40 per year, or 50GB extra for $100 per year.

Apple has launched new versions of Pages, Numbers, and Keynote for iOS making all three of the iWorks apps universal apps. That means you can now run them on any support iPad, iPhone, or iPod touch. Up until recently these three apps were only available for the iPad.

Pages is an app for creating, editing, and viewing documents with text and images.

Numbers is a spreadsheet app which lets you create and edit sheets on the go, while inserting charts, tablets, and graphics.

Keynote is a presentations app which you can use to create or view slides on a mobile device.

Each app runs $9.99 in the iTunes App Store. The iPhone versions of the apps look nearly identical to the iPad apps… just smaller. A few menus seem to have been tweaked or moved, but it looks like you get all of the same features whether you have a 3.5 inch screen or a 9.7 inch display.

You’ll need an iPHone 3GS or newer phone, or 3rd generation or later iPod touch to use the new apps.

Google recently rolled out a free Google Docs app for Android, but it requires an internet connection to work and doesn’t offer nearly as many features as the iWorks suite for iOS.

When Apple CEO Steve Jobs took the stage at WWDC today, he suggested that there were a hundred new features in the iPhone 4 and that he would only focus on 8 of the bigger ones. Sure, he talked about more than 8 things, introducing a few new apps, when talking about the operating system, for example. One app he didn’t mention was iWork. But that doesn’t mean it’s not coming to the iPhone. In fact, there’s some evidence that it might be doing just that.

Apple introduced a touchscreen-friendly version of the iWork office suite when the company launched the iPad a few months ago. Now it looks like there may be a new version scaled down for the iPhone’s 3.5 inch display.

As the folks at TUAW and MacRumors have noticed, if you look at the Apple press shot for Mail on the iPhone 4 features page, you’ll see a screenshot indivating that you can open a presentation file in Keynote. That would certainly seem to imply that Keynote and other iWork apps will be available for the iPhone 4.

If that’s true, I imagine the app will also be available for the iPhone 3G, 3GS, and iPod touch, since all three will be upgradeable to iOS 4 come June 21st.