woa, haven't seen this thread in aaaages.
I wrote all this stuff when I was just beginning, so if you need any hacks now: I can give you the really really really big stuff
like adding more pages to a profile, combining the report system of a forum to the one of CB, applying a watermark to the avatar if the watermark plugin doesn't work for you, etc. etc. etc. etc. etc. I wanted to finish this thread but noticed that the young group of 'hackers' such as me all changed to creating commercial plugins that didn't have anything to do with hacks or whatever. Such a shame to leave it all to the original makers.
btw: I think I made some promisses in this thread but never fullfilled them, if anyone still has need for them just send me an email: contact[!@!]ysva.nl or reply to this thread (I'm subscribed)