I really hate how spammy this sounds, but it’s a good use of Twitter to drive traffic to a product, in this case Mahalo.

Jason Calacanis, a master technology marketer, has announced that he will be giving away a MacBook Air to one of his twitter followers when he reaches 20,000 followers.

If you haven’t used Twitter before now is your chance to give it a try with a little incentive.  You might even want to check out Mahalo, a human powered search engine.  To follow Calacanis on Twitter just go here @JasonCalacanis

This is not an advertisement.  I just thought a clever idea deserves mention.  Besides who doesn’t want a MacBook Air?