I think it would be fine. The only snag I can think of is if people want to see the original code from your submission and not the additions / improvements for a post-compo version. I think there are ways to flag your commits as such though.

SVN is fine. I do bundle my src with my entry so people don’t have to look for it, but I also store it in a public svn. I make a branch for the “compoversion” so that people can look at the compo version even after I add fixes or improvements. Just making a SVN Tag would work too.

Well, I’ll make the tag then, but no changes have been made since the end of the compo time limit