That's a strong point. Fighting games are just doomd onrine.
Funny you mention that...
From what I've learned, Google is in the process of rolling out a new type of NAT transversal tech which completely obliterates the need for a proxy service.
Right now, playing through Gamespy's services means our connection goes through their servers because it acts as an intermediary in order to keep the connection alive. Otherwise, the connection couldn't be maintained due to firewall issues, since reaching a device on the other side of a firewall is immensely difficult.
With what Google is offering, the need for the intermediary really DOES go away, meaning the connection would be going between the two player's Wiis instead of having to pass through Gamespy or any other service.
Needless to say, this type of setup would be godly for online gaming and voice chat alike. If we had this instead of Gamespy, SSBB matches would probably be almost completely lag free from across the country, no question.