Me personally, I use my track bike as a commuter more than trainning. I probably only get in 100 miles a week on my bike unless i'm trying to do more. However, I know some roadies that get 300-350 miles a week or more. I mean, I used to ride with a 65 yeard old guy down here that had an average of 300 miles a week.
He was real ****ing awesome.
I want to live in bigger city so I can go more places and get more miles in. I love just riding into nothing, but I get bored with it everyday. Living in a place with NOTHING to do sucks.