[jim-greer]

We use Pivotal Tracker at Kongregate and love it. You can do everything from one screen. It's got a great lightweight approach to iterations and velocity tracking - once you've done a few iterations you get surprisingly accurate estimates of when you'll deliver that next release. It's both more pleasant to use and more suited to our needs than a straight ticketing system.

We use Basecamp to discuss features & comps, then Tracker to get them done. Trying to use Basecamp for both doesn't really work if you care about iterations, story points, etc. Some might say you don't need those, but they've given us a lot better predictability than we did at first.