After not riding for nearly 20 years, I put a tad over 1300 miles on my '84 Raleigh Super Course this past year. I'm not obsessed with how many miles I do but I find it interesting that I never did a ride over 35 miles and certainly didn't ride everyday and I was still able to put on what, for me anyway, seems to be a decent amount of miles. Quite a few of those miles are from my measly 3.4 mile round-trip commute.
I'm planning on a few metric centuries in 2007. I'd like to do 30+ miles each weekend if the weather permits. I can't imagine not riding every couple of days. I had a sinus infection for 1.5 months late this year and I couldn't do much riding. It absolutely drove me crazy. My biggest disappointment is that I went for 20 years without riding.
Have a great new year!