according to PCGamer.com, the polycount update will be out next month and will be bringing with it trading and a new game mode
http://www.pcgamer.com/2010/08/11/next- ... game-mode/
Not sure if it can be trusted exactly, but PCGamer seems like a far more credible source than some random guy on the TF2 forums, can't wait for it if its true, been dying to get my hands on those new pyro, solly, sniper and scout items, still not sure about those spy weapons (probably doesn't help that i don't really care for spy) but I'll wait and see what kinda stats they get before i pass judgement on them.
Edit: There also seems to be mention of a confirmed 6th polycount pack that wasn't in the list of winners, wonder which one it is, maybe its not too late for the poor neglected heavy, medic and demo