Just beginning to dip under $1/mile ... if you don't count the stem, the new seat, the computer, the clothes (and I'm just beginning on those) ... and I need clipless pedals/shoes next ... hmm ... i don't know. Priceless: getting to ride with SpongeDad this weekend for the first time (Ophelia had better move on outta da way).
Cost of my TKD (thus far): $.36/minute and dropping. Priceless: having my 10-year old want to do this with me.
But God help me if the 5-year old SpongeSon wants to take up a different sport. As it is, I'm always sore!