No word on what's inside it just yet, but Apple has just released iOS 4.3 beta 3 (build 8F5166b) to developers, so we're sure we'll be getting plenty more details soon enough. If recent beta versions of the OS are any indication, there's likely to be at least a few surprises in there.
Update: It turns out it's not specific to beta 3, but App Advice has discovered that iOS 4.3 includes another new feature that hasn't been documented so far: the ability to cancel App Store downloads.
[Thanks to everyone who sent this in]
