Everyone on the Internets is so nice and helpful these days. Earlier we mentioned a Wii inventory mashup one of our readers created. Shopping site Techbargains.com is getting in on the hunt for next-gen consoles as well, offering Wii- and PS3-specific shopping engines to locate the consoles in the inventories of online vendors. A trip to the PS3 and Wii TechHunter sites turned up nothing but auctions on eBay and Overstock.com right now. However, the links are definitely worth checking a few times a day until you get your hands on your console(s).
PS3 TechHunter
Wii TechHunter
EDIT: Yes, I spelled bargains wrong, which is just sad.