ideas for versioning query?

[Mike Sokolov]

A customer has an interesting problem: some documents will have multiple 
versions. In search results, only the most recent version of a given 
document should be shown. The trick is that each user has access to a 
different set of document versions, and each user should see only the 
most recent version of a document that they have access to.

Is this something that can reasonably be solved with grouping?  In 3.x? 
I haven't followed the grouping discussions closely: would someone point 
me in the right direction please?

--
Michael Sokolov
Engineering Director
www.ifactory.com