I've been looking for a laptop in the sub $400 range with an i3 and this is
one of the first ones I've come across.
Today only at Micro Center B&M stores. Toshiba Satellite C655-S5137 Laptop.
Regular Price $589.99 - $190 savings = $399.99.
Link: http://www.microcenter.com/single_product_results.phtml?product eNews 20110530
Specs:
IntelCore i3-380M
4GB DDR3 RAM
320GB 5,400RPM Hard Drive
15.6" Widescreen TruBrite Display (1366 x 768)
SuperMulti DVD Drive
Memory Card Reader
Mobile IntelHD
10/100 Network
802.11b/g/n Wireless
Microsoft Windows 7 Home Premium (64-bit)