It's so stupid how Nintendo handles wifi. They boast about how great the Wii is when you connect it to the internet, but if you don't have the LAN adapter, or a wireless router, you are in the sink and you can't access any of those special things. Wireless routers cost like $40-50 and the LAN adapter costs $30, and isn't even wireless. You have to run a 5 foot ethernet cord (comes with the adapter) from the end of the adapter (plugged into the wii) to your computer. If it doesn't reach? Too bad. If you want it wireless? Too bad.
It's really crummy when you buy a Wii thinking about all the classic games you can play and all the extra online goodies, and then not be able to access any of that stuff.