I am a fan to earn some quick money via bank promotions. In the last 12 months I have successfully got up to $300 from various promotions:
$50 Principal Bank
$10 PayPal (signing bonus)
Most of the promotions are still available. I have since closed the bank account for Principal Bank (poor online banking) and CitiBank (too many fees and no interest for checking).
I'm eyeing at the following deals (I'll sign up using my wife's name):
$150 CitiBank Deal (deposit $2,500 and pay two online bills)
$75 NetBank Deal (deposit $6,500 for 30 days)