We received an exclusive tip from a Robert Petersen that could allows current iDevice owners to access some of Apple's iCloud services a little sooner than expected.
Petersen was able to load up the AppStore and see a new "Purchased" menu, complete with working iCloud download links, as well as in iTunes. Also, in the store settings there are new options for automatically synching Apps and iTunes purchases.
All you need is a Jailbroken iOS device, have iFile installed and to do the following:
Using iFile browse to System/Library/CoreServices/SystemVersion.plist and change the current build from 8J2 to 9J2, and the system version to 5.0.0.
Save the changes and reboot.
Load the App Store and check you store settings and the changes should have taken effect. I'm currently doing this to my iPhone 4 and will post pictures as soon as I can.
Please attempt this and confirm Petersen's findings in the comments below. He performed his jailbreak on a iPod Touch 4 running iOS 4.3.3. Let us know of any problems or success stories you have implementing this workaround on other iDevices.