If your only choice for PlayStation and Wii purchases is the old Best Buy, take a gander at their supposedly "leaked" launch plans. They reveal that the demo station Kiosk rollouts will be October 20 for the PS3 and October 29 for the Wii, and that they will go on sale November 17 and 19, respectively.
They're also noting that the Xbox 360 Kiosk will be pushed onto the shelf display, and will feature the HD DVD add-on prominently. Check the jump for more info. The PS3 kiosk seems pretty awesome (47-inch 1080p, 7.1 home theatre, Lay-Z-Boy sofas).