As predicted, it arrived a couple days early, for the iPad, iPhone* and iPod touch
For a summary of the new features, see Apple’s (AAPL) press release.
Between downloading, backing up and re-syncing, the procedure took me nearly 20 minutes to update my iPad. When I checked, iMovie and Garage Band had not yet appeared in the App Store.
* For AT&T (T) iPhones only. Apple has not yet said when iOS 4.3 will be available for Verizon (VZ) iPhones.
Also on Fortune.com:
[Follow Philip Elmer-DeWitt on Twitter @philiped]