This deal has ended.
Through 7/14, Office Depot has an HP Pavilion Notebook for $549.99, the lowest without-rebates price I've seen (this has previously been $499.99 after $220 via two mail-in rebates). Office Depot has no image and almost no products details but the 15.4" widescreen display DV6305US model has a 1.6ghz AMD dual-core processor, 512mb memory, 80gb hard drive, DVD / CD burner, a memory card reader, Windows Vista Home Basic and internal wireless networking. Delivery is free. Amazon has more detailed info on this model.