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.