Compaq Laptop with 15.6" LCD, AMD 2GHz Athlon 64 x2 CPU, 2GB RAM for $399.97 shipped after a $120 rebate and a $30 rebate.  While in-store pickup is an option, the order has to be placed online for the $120 rebate to be valid.  Its features include a AMD Athlon 64 x2 Dual-Core CPU at 2.0GHz, 15.6" LCD at 1366 × 768 resolution, 2GB DDR2 memory, 250GB hard drive, DVD burner with dual-Layer support, wireless 802.11b/g, Vista Home Premium and more.  Others usually sell this laptop for about $600.  Note that at 6.52 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.