I recently came upon this post detailing an experience of cycle commuting. If you are thinking of starting cycling to work, hope it inspires.
I commute about 6 miles each way between Brooklyn (home) and Manhattan (work). I've been raving about it to everyone I know because it's legitimately changed my life. It feels amazing, saves money, keeps me in much better shape, gives me more energy at work. It's slightly faster than the subway, and significantly faster than driving/cabbing at rush hour.
I also love that transit time is very consistent (even relative to the subway, which has lately been wonky). It's great to arrive for our morning standup exactly 7 minutes early, rather than having to pad in 30 minutes of unproductive dead space in case the subway has some problem.