Commuter Rewards wants to pay you CASH for using alternative ways for getting to work. You can also become eligible to win free gift cards for taking part in the program...

Cash for Commuters rewards commuters who currently drive alone to work when they agree to start using a clean commute alternative. Start carpooling, teleworking, using transit, walking or bicycling to work and earn $3 per day, up to $180 over an assigned 90-day period.

http://www.commuterrewards.com/cash_for_commuters