Here are BBB's Top 10 Scams of 2012:
Top Overpayment/Fake Check Scam: Car Ads
The online ad says something like "Get Paid Just for Driving Around" - a prominent company is offering $400+ per week if you'll drive around with their logo all over your car. They send a check to you, which you are supposed to deposit in your account and then wire part of the payment to the graphic designer who will customize the ad for your vehicle. Whoops! A week later, the check bounces, the graphic designer is nowhere to be found, and you are out the money you wired.
Top Emergency Scam: Grandparents Scam