This deal has ended.
Update: this has jumped to $549.99. The Asus Eee Super-Mobile PC 900 Computer is available at Amazon for just $449.99 after this $100 mail-in rebate (expires 7/31). It weighs just 4.1 pounds and features an 8.9" 1024 x 600 LCD, Intel Mobile CPU, 1GB memory, 16GB hard drive, USB drive, SD card reader, wireless networking, and comes loaded with Windows XP. Shipping is free, with no sales tax (except KS, ND, WA, NY).