I haven’t used Groove, but based on the information on the site it really is just a tool that combines synchronous (chat) and asynchronous (e-mail) communication in one easy to use combined format with a recorder function. It gives you a single thread history of discussion around a topic, regardless of whether chat or e-mail is used.
It doesn’t have, at least yet, any desktop sharing capability to hold virtual meetings (all participants viewing the same PowerPoint presentation, video, spreadsheet, etc.) along the lines of Live Meeting.
There is vague talk about future plug -ins and capabilities.
Always sell the features of the version that isn’t out yet