I've raided in The Burning Crusade with less of a laptop than that. I did get only like 5 fps though.
That laptop will run the game, just don't expect high settings.
Like Mithness said, the gfx card will be sort of a bottleneck. Just make sure you tweak your settings till you get a balance of gfx and fps that you can live with. In a game like wow, gfx aren't that important luckily.