I was actually surprised at how painless and quick this was. Over my lunch break, I searched for promo codes/coupons for Google Adwords, Yahoo Search Marketing and Microsoft AdCenter, and signed up for each. I created some keyword lists (need to be tweaked obviously) and an ad for each. I entered all my information and then paused my campaigns. Very easy setup. If you’re interested, here are the promotions I used.

Google AdWords: $50 in free clicks ($5 setup fee waived)
Microsoft AdCenter: offer code AFF0108V1 $50 in free clicks (plus $5 setup fee)
Yahoo Search Marketing: $100 in free clicks with ($30 minimum deposit)