The results of this poll will depend heavily on the time of posting. We are getting a bit of an older skew right now, most probably due to the fact that people are posting this while at work (while the younger users are still at school).
I think if you ask this question at, say, 6pm, the mean age would be much lower. --- "Its not the size of the dog in the fight, its the size of the fight in the dog." -Mark Twain