I've been working on a bot based off HPB Bot and it's looking for home here on Bots United.
It's called Sandbot and it's for for Gunman Chronicles and They Hunger (it's got work in progress support for Day of Defeat, Natural Selection and The Ship as well as the other bots supported by HPB Bot).
You can download it from
http://www.moddb.com/mods/sandbot and see the source at
https://github.com/tschumann/sandbot