I'm yet to see a Wii, I look everytime I go to Wal Mart, Target, Best Buy (rarely), Circuit City, Sam's, and walking by Gamestop and EB Games in the mall.
Only time I've seen one was 8am in december when I went to target off a tip from wiiseeker. I've only checked stores out of curiosity maybe five times since then and haven't seen any more.
i bought a wii on release date i waited 28 hours in line. since then i have seen wii's on shelves 5 times but i live in a smaller town so i expected that. but we have a steady flow of wii motes and the rest of the controllers and point cards