Here is a list of a few changes I ran across when changing my code from beta 1 to beta 2. The DockingPanel stuff has gone altogether, you completely remove these from your project altogether in most cases. This doesn't seem to have any detrimental effects on how the code works and runs.
The FtpRequests.UploadFile etc constants have now moved to be in WebRequestmethods.Ftp.UploadFile. There is no easy pointer I found in the docs to point to where this disappeared to.