It seems to me that (a) bboard is absolutely one of the core, core ACS modules, and (b) everybody agrees that it could use some enhancements in terms of email handling and other capabilities. The company I work for has invested some money into adding email enhancements to bboard already. Unfortunately, due to circumstances that aren't worth going into, these enhancements were added to a highly non-standard (and somewhat ugly) version of bboard in an ACS Classic 3.4 installation. At some point in the future, I anticipate we will able to invest more money into beefing up the email and other capabilities in the OpenACS 4.x bboard.
What I'm getting at here is that there seems to be a lot of interest in bboard right now and it might be worth setting up a forum devoted to it, much the way CMS has its own forum. Has anyone yet volunteered to be the lead on porting bboard?