The Xbox 360 will be cheaper than Nintendo’s Wii, but only in Japan. From Game|Life:
During a media event held in Tokyo today, Xbox Japan general manager Takashi Sensui announced price cuts for the Xbox 360 in Japan starting September 11. The bare-bones Arcade unit — it comes with no hard drive — will be priced at 19,800 yen ($183), making it the first current-gen console to dip under the $200 level. Nintendo’s Wii is currently priced at 25,000 yen ($230) in Japan.
Microsoft Prices 360 Below $200 in Japan [Game|Life]



The 360 is already is cheaper than the Wii in the UK and Europe, and has been for some time.
The Xbox 360 Arcade pack is £159 / 199 Euro, and the Wii is £179 / 249 Euro.
In fact, just looking at Amazon.co.uk, they’re selling the both the Wii and the 60Gb Xbox for £179.
Yep. Cheaper in Australia too. $349 AUS to $399 AUS for the Wii.
Although I’d still buy the Wii any day and I’m guessing that the Wii price will continue to stay at that price for a while considering they’re still outselling the X-Box and PS3 every month.