FogBugz works great on its own, but it really magnifies your productivity when you hook it up to your other tools.  FogBugz works together with source control, RSS aggregators, IDEs, and reporting software - and more.  The new FogBugz Ecology page lists major applications and systems that you can use to extend FogBugz's functionality.  We'll be adding to it as we find out about new plugins and mashups - tell us about them.

Also: if you're a Fog Creek Copilot subscriber, you can now cobrand Copilot with your logo, and point your customers at Copilot helpee download pages from your own site to provide a seamless support experience.  Check out the FAQ and branding tutorial.

Fog Creek Copilot, now at version 2.3, has file transfer, Mac support, and direct connect to make tech support really painless.  If you haven't checked it out since the 2005 initial release, check again -- Day Passes are only $5.