We wont hear anything for the next several months. I suspect well see the first beta by late Spring, most likely May or early June at WWDC with a possible developer preview at that point. Starting from WWDC, well start to see multiple builds being pushed out, leaks and so on.
Apple releasing the beta version at WWDC would be quite late for a Summer 2011 release, but anyway, I hope, whenever it comes, it includes the much anticipated "plural apostrophe killer", it would do the languages some good.
I don't think apple is going to wait until WWDC. In the past they previewed and then provided the developers the beta at WWDC (or shortly there of). Since they already previewed it, they'll just release the beta, probably this spring