This time, I'd like to take a straw poll:
What collaboration software do you use when writing grants with others and sharing results? Is it a commercial package such as Lotus Notes or MS Visual SourceSafe? A service such as Groove or Yahoo! Groups? A free system such as CVS? All of the above?
This includes file sharing, mailing lists, and version control.
In my research group, we use CVS and mailing of Word files, with some file sharing being done using Yahoo! Groups.