This deal has ended.
Buy.com has the Lenovo ThinkPad R61e 7650 Laptop on sale for $445. This model isn't a powerhouse - it only has a Celeron processor and 512MB of RAM - but would be enough for a casual user. It also has a 15.4" widescreen display, 80GB hard drive, CD burner, DVD player, and comes loaded with Windows XP Professional. New Buy.com customers can take $10 off $200 and new Google Checkout users can get a $10 discount (you can't get both). Shipping is free and there's no sales tax (except CA, MA, MD, TN).