For those who don't mind lugging a weighty machine to have more power to larger screen sizes - here's an option (weighs 9.9 lbs).
Toshiba Satellite P25 - P4 2.8GHz HT, 512 MB SDRAM, 17" screen (1440x900), NVIDIA graphics, 80 GB HD, DVD-multi, Wi-Fi, USB/iLink/FIR/SD media/TVOut, 10/100, and...