Source code control is not a great location for docs in binary format, so I'd use it as a last resort.
I'd suggest setting up a wiki or some internal website. We use Sharepoint for storing and managing this kind of doc. A wiki might not integrate too well with things like an Excel spreadsheet (although maybe it could be made to work), so you may need to store docs like that on a share drive and reference them from the wiki.
Another idea for a regular meeting like this might be an internal blog to report on progress and record minutes, again referencing docs on a share if needs be.