As I've said before, roundup is an amazing issue tracker. Last time I wrote I had just implemented our internal bug tracker with all the weird requirements of a few developers. By now the incredibly flexible system, thanks to python, has been moulded into our complete project management tracker.
This second instance tracks our development effort from customer wishes through to specifications, development and passing of acceptance criterias. All with the help of a few (three actually) IssueClass es and some funky relationships between them with the help of python functions as detectors. The last part of the equation is our good old wiki (moinmoin if you where wondering).
PS: No it didn't take as long as these two posts about roundup are appart. For one I did lots of other stuff in between. And secondly I've been meaning to tell people how flexible roundup is for a while now.