I think you're referring to the
Uniwill 259EN3. It has a switch to select between Intel GMA900 and 6600go.
RJ Tech has it for sale. You have to turn off the laptop in order to switch.
Alienware's new
m5500 looks to be built on the Uniwill, but it's customizable with different screen resolutions instead of just the standard WXGA.
I can't find specs for the battery, but Alienware's site says it can last up to 3hours, which makes me believe it only has a 6-cell versus 8-cells in a lot of other 15.4" widescreens.