Of course, Zach has already written extensive tips on how to win in there, but Slorkuz has a few tricks of his own -- rather than the usual 5-5-5 group, he recommends a 4-3-3-3-2 setup, with a group of four holding down what he says is the most important node, the Blacksmith. It's the closest point to all of the nodes, so if you group has to move fast, that's the place to be. The other three person groups hold down the other nodes, with an extra three person group and a duo moving back and forth and defending as necessary. And in a tournament setting, there are lots of things you can do to make the setup even stronger -- give mount buffs to the moving players, communicate back and forth to match the numbers, and make good use of CC when possible.
Definitely food for thought (and probably enough to pull me back into AB for a few fights this weekend -- to get Make Love, Not Warcraft, if nothing else). When Wrath actually releases, Wintergrasp will probably be the place to be, and I'm just plain tired of WSG and all the shenanigans in AV, but AB still seems to have some fun in it.