I have no idea what the rules are. I don't think anybody on earth actually knows what the rules are.
Coordination between 527s and the campaigns is probably against the rules, would be my guess, but I just don't know.
That's what I've heard as well, though it certainly hasn't stopped the Kerry campaign from hiring bigwigs from MoveOn.org and lifting material from Michael Moore's "Fahrenheit 9/11".
Once again the Democrats insist that everyone give them a pass while they accuse others of the same thing they're doing.