Considering I've had laptops fry on their own accord simply from being used over time, I definitely wouldn't recommend this.
I had a laptop I used as my work computer, due to being a uni student who'd go on exchanges frequently. After two years, I had hardware failure due to heat death. Was cheaper to buy a new system, rather than just replace all the fried components.
Is it possible to OC a laptop? Yes. Is it possible to do it without destroying your computer? Only if you do some pretty serious case modifications, at which point you lose the mobility aspect, and it's no longer really a laptop... just a desktop using more expensive, less efficient parts.
EDIT: The new laptop I got was the laptop you, yourself, have. It's a mobility version. Personally, I love this puppy, and I wouldn't trade it. But even it gets hot on its own accord. Also realize that by overclocking, you're going to draw more power, and your battery life will suffer significantly.
Furthermore, as a chemical engineer who studies heat transfer, there's a limit you can reach simply by increasing the air flow. After a while you're going to need to increase surface area as well, which you can only accomplish through a different heat sink... So simply pointing a vornado at it won't help you very much.