There is a lot of speculation about the next version of SharePoint (I'd simply say that don't believe everything you read on the public blogs). I have had several students in my classes over the past few weeks where the product team has given a nice preview of the things to come. If you are really wanting to get a handle on the upcoming features (UI redesign using AJAX and new css styles, core changes, etc). I'd suggest you get with your local SharePoint Evangelist and ask for a product team demonstration. They ARE doing it, and if you have spent alot of money on SharePoint with Microsoft, you should definitely ask about and for a demo!
Although i can't say anything about a lot of the new features, I'm looking forward to building/refreshing the next version of courses to match the really awesome next version of SharePoint!