Dunno how good they are as they are only for USA customers, but maybe someone will find them interesting:

  1. Want the Apple iPad? - Test & Keep your iPad for FREE!
  2. Wal-Mart $1000 Gift Card in 5 min - $1000 Wal-Mart gift card with just a simple survey!
  3. 5min survey for $1000 Best Buy Card - Take a quick 5 min survey and get a chance for a $1000 Best Buy Gift Card!