Not sure why Stardock would be using NAT-T. Thats for IPSEC encapsulation and has nothing to do with p2p or network gaming. Or is it a buzzword for some in-house thing?
I'm glad to see someone with the Tomato firmware is able to play. I'm running the same setup without the MLPPP and I can't get a multiplayer game going to save my life. This would indicate it isn't the router but either my ISP (AT&T) or maybe its the fact that I have to use PPPOE. I haven't tried it at the office where we have direct net connections without NAT since the first day, but now I'm tempted to do so if people are actually able to play.
Annekynn, are you on cable or DSL? Does your Internet connection require PPPOE?