HP Pavilion Laptop with 17" LCD & AMD Turion Dual-Core 2.2GHz for $599.98 shipped.  It comes with AMD Turion Dual-Core 2.2GHz, 4GB RAM, 320GB hard drive,  wireless 802.11b/g/n, integrated webcam, DVD burner, and more.  Note that at 7.75 lbs, it is more like a very portable desktop instead of a  truly lightweight laptop.  For the other end of the spectrum in terms of extreme lightweight and portability, check this out.