It looks like there will be some kind of financial incentive to bicycle commuting as part of the plans being discussed in Washington: PDF file (see pages 205-207)
Section 211 of the "Emergency Economic Stabilization Act of 2008" allows for a "qualified bicycle commuting reimbursement" for "reasonable expenses incurred by the employee during such calendar year for the purchase of a bicycle and bicycle improvements, repair, and storage, if such bicycle is regularly used for travel between the employee’s residence and place of employment."
I look forward to seeing what actually happens!