So, I just tried playing Mario Kart DS online just to see if I could and it actually worked. I had tried to reconnect my Nintendo Wifi USB connector before and it hadn't worked, but now it is working. I'm so glad I can finally play World of Goo and other vc/wiiware games, plus online games.
If anyone wants to be my wii friend, so we can trade individual friend codes for games, here's my wii number: 6435 0200 2667 4766
And because Brawl's the game I'll probably play most, here's my Brawl fc: 3222-5285-7340
If you want, you can just post your number here, or PM me. Thanks.
EDIT: here's my Mario Kart Wii fc as well: 4854-7019-4007
