David, I have not hit any bugs with Kid. I really like it as a templating language.
My desire is to allow widget developers to leverage any templating system that has a TurboGears templeting plugin. As I learn kid better, and write more code. I will use it more. I have complex STAN code that I would really like to bury in a widget. I like kid for the page layout, and simple widgets. It is a personal preference of mine (or weakness of mine) that I like to write complex widgets in code (like a JSP tag). I would like to be able to use pure python for some of these widgets. STAN fills this use case nicely. I really like what you have done with kid, and look forward to using it on my sites. Thanks Mike

