Really interesting, as long as you can stop it from becoming 4chan. :P
The thing I'm hoping is that it 4chan continues to be the best place to trade porn. They do it better, ImEveryone is more about the actual communication, hence the semi-persistent identities, threading, etc.
I can run ImEveryone in black and white with little difference.
In the gap between the post and the submission hitting the front page there's some degree of filtering - you could get around it if you wanted to, but why not just send to 4chan?
You probably need some sort of warning for that..