I use Checkvist to plan my work on TeamCity, and recently I got a chance to use TeamCity to assist Checkvist development.
TeamCity recently reached its next milestone - 4.0 release. One of the interesting things it has is Rake build runner (so it can test Ruby and Rails projects).
You know, software must be tested before the release. So I tested this runner by creating a Checkvist build configuration in TeamCity. It happened to work so nice, that I couldn't resist to prepare a short and dirty demo.
Definetely, I had to break some Checklist tests to demonstrate some cool TeamCity features :)