I finally got my Wii online with a LAN adapter and have been playing online the last few days, mainly Mario Kart and Goldeneye 007.
I've found it to be fun, but frustrating. The Mario Kart experience is much like what people complain about in the off line game. There isn't the AI problems of course, but staying in first is frustrating, in most races I could get to first place, but staying there is impossible.
In Goldeneye it seems to be far too random, in a ten minute game, I managed to kill roughly 20 people, but died like 20 times. So that's a kill every 30 seconds, and a death every 30 seconds, You never know where a shot is coming from until it's too late. Death comes from all over the place, there doesn't seem to be any strategy, no way to stay alive. It's like a bunch of two year olds yelling "POW POW!" at each other.
I know what most people will think, the Wii isn't the online console, but is it the same all over?