I've been fiddling with the Template Toolkit for the past few days, and it's fantastic. The conditionals are powerful and the way to do it makes sense. I did notice one error in the slides on the template-toolkit page in the MyHandler.pm that they give as a demo. Since the PerlModule in Apache needs an exit status of one, you just add a "1;" at the end of your MyHandler.pm file (or whatever you would like to call it.
in reply to Follow-up to my Template question
Other than that little issue, Template Toolkit rocks.