Do you think it's best to address those through distribution lists
(therefore new groups), web pages with comments (leveraging existing
groups), wiki with comments (leveraging existing Google Code
project), or bulletin board (cleaning/securing existing or migrating
it to my server where I can clean/secure it)?
Personally, I would lean toward either flavor of bulletin board. It
appears to me that Google does not integrate bulletin boards with
either Code or Groups, so if we do want to go the bulletin board
route, it would need to be external to Google.
Ryan