The iWork suite for iOS, composed of Keynote, Pages, and Numbers, just got a big iCloud functionality update today from Apple. Once installed, you'll be able to login to icloud.com, and find your documents in the iWork section. Similarly, simply drag and drop any iWork document to iCloud.com to sync it to all of your iOS devices. If you pick up an iPhone 4S later this week, you'll also be able to add text to your documents with the phone's voice dictation. All apps are free upgrades for current users, and are available from the iTunes App Store now.