I'm riding about an hour and a half a day for my commute (8.5 miles each way) plust whatever errands I run on the bike in the evenings. If I'm feeling like a bike ride on the weekends, and not too swamped with other responsibilities, I'll take a ride that can end up being anywhere from 20-50 miles.
Ever heard of somebody else who wishes for a longer commute?
I'm moving this weekend... about 5 miles farther from work, so I'll be adding 50 miles to my absolute minimum mileage every week... to 135 miles a week, plus errands and recreational rides.