Yeah, good call on Sears -- I just ordered one via their website via "in-store pickup", so hopefully I'll be able to drop by the location when they open tomorrow and pick it up, unless their inventory wasn't accurate.
Those of you who want to try that: go to Sears.com, put Wii Fit w/ Balance Board in your cart, and it should only allow you to choose "Store Pick Up" under Arrival Method. Then you put in your zipcode and start browsing for stores. I had to browse to the 2nd page of local stores before I found one that had any. It's pretty easy to use.