Zero. I offered to lend my spare bike to a co-worker to see if he'd like the ride in. He lives a few blocks from me and started working out at the gym, I thought the bike ride would be a nice complement to the gym. No go, but my offer stands. I don't go preaching it though, but some people have asked me about it and I answer their questions.
However, this year is the 1st Annual Bike to Work day where I work. I wonder if there will be any new commuters after that. I'm not the only commuter anyway, but I work at a rather large academic institution. So long as I can still get a spot on the bike racks... Naturally, I have jury duty starting the week they have the bike to work day, and I was looking forward to seeing what kind of turnout there would be.