I would encourage anyone interested in the new Office 2007 lineup to try out the Beta 2 software.  It is available from the following link: http://www.microsoft.com/office/preview/beta/download/en/default.mspx 

Regarding my previous post on Groove, I would highly recommend you try out Groove with one or more colleagues to see how powerful the tool can be in enabling collaboration.  Try it out on a project you are working on, I think you will find it is a very secure, accessible system which enables you to effectively manage project resources in a transparent manner.