just a file parser looking for all the hooks/filters then some reverse calls to bring up source code references – then data is pushed into custom post types w/various taxonomies. (needs some work still but waiting until next round of bp/bbp/wp updates)
i have an auto-generated (iffy wordpress search-able) list online as well
http://etivite.com/api-hooks/#bbpress
which is similar to the code posted above – forgot about array hooks so when bbPress 2.1 hits – it will be updated.