Help spread the word: blog about it, write articles about it, recommend it to others, etc.
If you think there is a bug in Cheetah, send a message to the email list with the following information:
If you're developing a website with Cheetah, please send a link to the email list so we can keep track of Cheetah sites. Also, if you discover new and interesting ways to use Cheetah please share your experience and write a quick tutorial about your technique.
Cheetah is packaged with a regression testing suite that is run with each new release to ensure that everything is working as expected and that recent changes haven't broken anything. The test cases are in the Cheetah.Tests module. If you find a reproduceable bug please consider writing a test case that will pass only when the bug is fixed. Send any new test cases to the email list with the subject-line "new test case for Cheetah."