As for profitability, I'm really in it for curiosity more than profit. I had read that nVIDIA cards were essentially useless, and I can't afford a better rig.
What are you getting, about 6MH/s? You are using more in electricity than you will ever make and are probably shortening the lfespan of your laptop. Even if you look at the temps, mining is a large strain for shitty laptop gpus.