AMD-based laptops are becoming increasingly widespread lately, and some of them are surprisingly good deals. Take HP's Pavilion dv4: an honest-to-goodness 14" laptop with a 45-nm Turion II dual-core processor and Radeon HD 4200 integrated graphics. Newegg sells that system for just $449.99, and you can bring the price to $399.99 using a mail-in rebate.
The dv4 doesn't look like the most portable laptop out there, but it really has an uncannily well-rounded set of specs for a $450 notebook. You get 4GB of RAM, a 320GB hard drive, a DVD burner, and a 64-bit copy of Windows 7 Home Premium. There's even an ExpressCard slot—try finding that on a $400 ultraportable.
From what we can tell, the system's only real downsides might be its thickness (up to 1.57") and its battery life, since HP only throws in a six-cell battery (we're not seeing a battery life rating anywhere, though). If you're looking for the ultimate road warrior, you'll probably want to look elsewhere. For a dependable everyday desktop replacement, though, the Pavilion dv4 seems like a pretty decent deal.
Update: In other deal news, we've just noticed that Newegg is offering the Samsung's 1TB EcoGreen F2 hard drive for $54.99 with free shipping. The list price is $69.99, but you can shave $15 off of that by entering the coupon code "HD7915" on the checkout page.