I was recently listening to IGN's last (for the season) Wii-k In Review podcast, and they said that huge Wii shipments will be going out all month. But the only way to have any chance of getting one is to camp out before a store opens. I'd say, give it a shot. Try camping out for about an hour before a Gamespot or other retailer opens, or hit a Wallyworld during off-peak hours and see how you fare. Either way though, it's going to be madness. Turned on the news this morning, and the Wii-shortages story was on the tele. If it's mainstream news on an almost daily basis, chances are you're still going to have a hard time finding one.
Good luck.
