The Microsoft Store has HP Pavilion dm3-3012nr 13.3″ Notebook for $399 with free shipping. This sold out very quickly last time it was available, so don’t wait if you want one.
Here are the specs on this computer:
Intel Pentium U5400 1.20 GHz
13.3″ Diagonal High-definition HP BrightView LED (1366 x 768)
4 GB DDR3 Memory
320GB SATA 7200 RPM Hard drive
Windows 7 Home Premium