It stacks up pretty well as a project manager, but it really shines as an ecosystem manager. Bugs can be bounced around between projects and tracked at external

It stacks up pretty well as a project manager, but it really shines as an ecosystem manager. Bugs can be bounced around between projects and tracked at external sites. I think it's pretty tightly coupled with Bazaar, to the point where you can clone a repository by typing "bzr branch lp:projectname", but it appears to support mirroring of other repo types.