Upcoming Linux TortoiseSVN equivalent
code.google.com
code.google.com
Eg, if I see an odd emblem on something I don't remember modifying recently, I can inspect and diff. It could be some minor string fixes, or something more substantial. Either way, rather than doing a whole-tree commit (which wouldn't include a comment for the file I didn't remember editing), I'll now do a granular commit to that single file with an appropriate message.
I'm intending to jump in (as a user, and perhaps a developer - it's Python / Glade/ GTK) when 0.12 is out.