Congrats! Coming up on 2 years for me (started bike-to-work week '08). I think that's a very cool idea for a Lenten sacrifice. Logistics limit me to mostly 2x/week winter, 3x/week the rest of the year. I also wish I had started sooner.

I bet a lot of people started spring/summer of '08, as high gas prices provided that extra bit of incentive.