Update: 12/21/10
The benefit is safe for 2011.
Original post: 11/23/10
Part of the stimulus bill was a provision that allowed employer-provided transit benefits to be deductible expenses at the same level as parking: up to $230 per month.
That provision will expire in January and the cap on deductible transit benefits will return to $120 per month.
T4America has a petition drive going to ask Congress to keep the limit equal between driving and transit.