A few options for you to look at: lenovo IdeaPad Z570 15" notebook $550
Core i3 2310M(2.10GHz) CPU, 4GB RAM 500GB HDD 15.6" 1366x768 LCD w/ GeForce GT 520M.
Will run WoW on medium graphics nicely. But the included webcam is only 0.3MP, not ideal of Skype HD.
TOSHIBA Satellite L755D 15" notebook $530
AMD A-Series A4-3300M(1.9GHz) 4GB RAM, 500GB HDD 15.6" 1366x768 LCD w/ Radeon HD 6480G.
WoW on medium graphics but not quite as solid as above, mostly due to the slower APU speed. 1.3mp for Skype HD quality.
Bestbuy usually overprice their products. I'm sure that I spot some llano laptop for around $600 when I visited month ago. Go check, you can always cross reference to newegg. Here are some from logicbuy.
1.3mp is the least you want for Skype. 2.0mp is better.
And for best Skype experiance I'd want one of the premium aftermarket cameras vs a built into the laptop model. Logitech QuickCam Pro 9000 2.0mp gives you better sound, video and flexibility to use the camera without moving the laptop around.
check ebay for the m11x. I got one locally for $400 and haven't looked back, it's got some gaming power, decent webcam but mostly it's really portable to take anywhere no problem and great battery life