Ray seems smart enough to realize that in the real world, a collaboration tool that doesn't bring all virtual team members to the table isn't a solution. The new product launch team wouldn't be able to share marketing materials with the Mac-based ad agency or requirements documents with the Linux types in the web development professional services partner. Without that, we're back to Notes; a really nice Swiss Army knife, but one that can only drive Torx ® screws.
The good news is that Groove isn't waiting for people to convert or even for Microsoft to create the .NET conversion kit. They created SOAP access to Groove and made it publicly available. At this point, Ray is saying all the right things; balancing the power a native application with the expandability of an open application. The only question is will Groove continue to support this little backdoor and the 3-man team that is responsible for keeping it open and will someone out there create Linux and Mac tools that can take advantage of it?
It's good rerereading the links he provides and nice to see he mentions some of 
