Sorry, to reply so late Julius. I think those are some fantastic ideas and I definitely would be interested in such a system. I agree that OWW is a better spot than Sourceforge. It would be nice to have a wish list somewhere on OWW to start bouncing around ideas of what would be essential, useful, etc...

Couple details:
1) repository probably should use svn not cvs. I used cvs for my open lab notebook now, but it isn't terribly good for binary raw data files
2) you all would need quite a lot of space, since raw data can be pretty hefty (particularly versioned raw data)

One definite thing for the wish list:
Any project blog needs a feature on the comment submission that allows folks to get an email when new comments are added to a post they've commented on. It's really difficult to have a group discussion like this with a blog comment system, because it's hard to know when new comments have been added (unless you are the author of the post).