iOS 4.3 GM seed incoming, general release next week?

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?
[BGR]
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Rene Ritchie is one of the most respected Apple analysts in the business, reaching a combined audience of over 40 million readers a month. His YouTube channel, Vector, has over 90 thousand subscribers and 14 million views and his podcasts, including Debug, have been downloaded over 20 million times. He also regularly co-hosts MacBreak Weekly for the TWiT network and co-hosted CES Live! and Talk Mobile. Based in Montreal, Rene is a former director of product marketing, web developer, and graphic designer. He's authored several books and appeared on numerous television and radio segments to discuss Apple and the technology industry. When not working, he likes to cook, grapple, and spend time with his friends and family.