Sorry for being late to the game here.
I'm the owner of bug-tracker, and I will be working on it in the coming weeks, but I'm not sure how the timeframe will match that of the 4.6 release, and as discussed, it shouldn't be a problem.
There's currently a bug-tracker up for bug-tracker at
http://clients.museatech.net/bug-tracker/bugs/
The home page for bug-tracker is one level up from that.
Besides, Collaboraid has a page up with our thoughts about OpenACS development, including workflow and other ideas, we're toying with, here:
http://www.collaboraid.biz/openacs/
/Lars