It varies given my work; my last commute was about 35 miles rt, of which about 8 was covered by bus to avoid bad rush hour traffic.Today I put in 19 miles.
I do contract work for various people so my commuting varies. If I can find out how to post it take a look at the Rivendell Grant Petersen would like to disown a '95 Waterford built 26 wheel road bike for a 5'10.5 rider. It's wonderful. I also have a 650C fixed gear from Rivendell.