Thanks for the replies.
I can collect a maximum of $20 in Accor funny money tax free per month for each month I commute by bike. In order to do this I have to submit receipts that show my bike commuting expenses. Then my employer issues Acco checks in the amount of those expenses (up to $20/month), which can be used for additional purchases at a participating bike shop.
It's not a lot but it is enough to keep my bike well maintained. I have not received the checks from 2010 yet, but should get them soon.
I had hoped to use the checks at the two LBSs I deal with regularly, but neither was interested in becoming a participating shop.