Hi Tony -
The answer is 'yes, but not without some work.' Obviously, if they install
Groove, then they put themselves out of your 'non-groove' state so we need
follow that train of thought no further.
Your other options include
1: Using a SharePoint Files tool to share copy files from Groove to
Sharepoint2007 and then out to your non-Groovers.
2: Use Groove Web Services to take the contents of your files tools and
publishing them somewhere else. This requires some programming, which is we
can help you with.
Is that Charlotte, NC? We're based in Chapel Hill.