So far I've both experiences with SSBB and AC:CF. My Wii is about 3 meter from the router (AzTech DSL605EW) and is separated by a brick wall.

SSBB: Most of the time can get connected, but usually apparently no one online to play with. Also, online play quite lag when I play with friend from Texas.

AC:CF: So far, best experience. Friend from Texas have no problem dropping in, and I have no problem visiting her town.

PaiGeWonG: Check your router settings. Some router can be partially compatible, but transmission channel must be 1 or 11. If still fail then maybe you can force manual configuration. Another problem is that a neighbour WiFi router is on a same channel as yours and is interfering with your channel. That one you need to get a PDA or laptop with sniffer software and scan the area.

This post has been edited by RAMChYLD: Dec 27 2008, 12:09 PM

Tetris Party? I haven't tried it yet, but people here were raving about it for some time.

Also, as an Animal Crossing fanatic, I must mention Animal Crossing City Folk. Most people agree that the game can be fully enjoyed offline, but it is better experienced online with friends.