Yep have to agree with everyone here... Melbourne by a mile and a foot length ATM as they are involved in a stoush that seems to have all fans from both sides ready to attack.
I reckon Brisbane are a rival as well due to the local derby but also there will be just as fierce rivalries with the Dragons and the Bulldogs, with both sets of fans having a 50/50 split on supporting the Titans and hoping they get the wooden spoon at present time... it should make for an action packed 2007 though...