Building upon a pre-existing modification, I incorporated a few bug fixes, changed the way Bible versions are added, and stripped out the dynamic equivalency and (*gag*) paraphrase versions from the list, adding a plethora of better translations instead.
The modification, compatible with phpBB 2.0.21, will automatically link verse references found in posts to the appropriate passage on BibleGateway.com. The version that is linked to is selectable via user profiles, and the installation default is the New American Standard Bible.
It is by no means perfect, and I would have liked to use the more comprehensive regex, but I didn’t understand it, to be honest, and it looked like it could be pretty processory intensive, but I could be wrong.
Anyway, enough chit chat: if you run a Christian or otherwise religious message board that carries with it many Bible references, grab the BibleGateway MOD and enjoy! :)