BGR, who was accurately tipped about the last iOS 4.3 beta release data and build, has heard that the Gold Master release for iOS 4.3 (8F190) is done and could go out to developers at any time, with the full release version possible for next week's iPad 2 event.
Certainly sounds reasonable. We'll know the first part when the GM hits developer.apple.com, and the second part when Apple execs take the stage on Wednesday.
We know a lot about iOS 4.3 already (see our iOS 4.3 walkthrough) so what I'm more curious about is whether or not there will be any previously well hidden, iPad 2 specific features still to be announced? (Other than Photobooth for iOS...) Any guesses?