i know that it can be done because Yahoo! eGroups utilize this feature. i think it's an essential feature for a messageboard system. you can also receive all posts via e-mail or just digests, etc. some other boards allow you to subscribe to threads, forums, or posts by a specific author also. some of those features are in
OpenTopic. i'm researching it right now. also don't know Perl, but this will be my first hack.
