We have about 90 employees between the Richmond and Denver offices (4 in Denver). The Richmond office is almost inaccessible by bike - I refused to ride on an 8-lane road - but one woman there bike commutes occasionally. I commute here maybe 3 days a week and hope to increase, though without the option of showering I may get sick of it in the summer.

One employee walks sometimes (he lives ~500 feet from the office)...but he drives about half the time. Seriously.