To go follow up on our post about scalpers returning PS3s to stores, here's a website that lets you find where PS3s and Wiis are in stock around you.
Just scan the map and you can see how many they have in stock or when the next shipment is. For some reason Circuit City and Target aren't reporting their numbers, but Best Buy is. At the very least, you can easily see the store's phone numbers so you can ring them up and ask.
Product Page [PS3 Bidnearby]