I wonder how many of those posts/messages were from Bruno?

That does sound like a lot of hassle indeed. I hope it's worth it. Also you probably did the right thing by PM-ing those who had there PMs exposed. It's a good time to remind people that PM stands for personal message, not private message...
Note: PM privacy is not guaranteed. Encrypt sensitive messages.
Do/did you get any compensation for the effort you had to put into this?
Well he probably should have been compensated for his time and effort but I bet he wasn't. Seems like a mammoth task to collect all that info.
plus a complete copy of every thread in which anyone mentioned BFL
LOL.
This is pretty much the whole forum, right?

They should just do that themselves if they really wanted it.