I just had to add to this.....
It seems that GVO 3.1 is being abandoned. I'm a long time user (starting
with version 2.0) and am concerned that the product has been placed under the
knife and it''s parts removed so that other products may prosper.
First the 200MB (2007) client compared to the <30 MB 3.1) version does, in
some ways, less. Then deprecating the peer-to-peer chat, the document review,
Outlook integration, and various other sacrifices.
Now, it appears that IE7 breaks the older forms (2.5) that are a part of the
Mobile Workspace for Sharepoint template that is/was extrememly useful.
Groove 2007 will currently only support Sharepoint 2007 Document Libraries -
not the other Sharepoint items such as Contacts and Discussion. I know you
can add those in Groove but they aren't synchronized with Sharepoint. If you
want a solution where browser-based Sharepoint 2003 clients and Groove 3.1
clients can be equal partners, you're choices are evaporating.