It doesn't take that long for me receive mail on the Wii I've emailed my Wii and it took roughly about a minute, and I was using the Nintendo DS Wifi Connector thing too. @_@
Wii Friend Code: 6640 6364 5205 2747
nickname: Mistah Wii
Battallion Wars 2 - 399 547 994 437
Mario Strikers Charged! - 369473 902831
There ya' have it. . .