They all need to stand trial. Bush's biggest error, IMHO, has been that of not holding the Clintonistas responsible for the devastation that they wrought. I know he was trying to establish a "new tone," etc., but even that failed, since the Clintonistas simply took it as a sign of weakness.
Investigate, prosecute, and convict - even BJ himself.
I used to think that way, but now I realize that Bush is a VERY patient man. He has given them all the rope needed for them to hang themselves....the Wilson-Plames also, and they will indeed hang themselves.