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You shouldn't have to wait to try iCloud - it was already up and running for anyone who has purchased an iPhone 4s, and is now available for anyone who has downloaded IOS 5 to their iPhone or iPad, or who is running Lion OSX 10.72.
Be advised, however: iCloud only syncs 5gb of content for free. Depending upon the size of the data you keep on your IOS device, you could have to pay a considerable sum to add more storage compared to Google or Amazon's cloud storage.
iCloud: $50/50gb (maximum)
Google/Picasa storage: $50/200gb, $100/400gb
Amazon Cloud storage: $50/50gb, $100/100gb