If your site's copy asks that question, one of the first things I should see after submitting my birthday is, indeed, my age after 1,000,000 seconds. Seeing a list of everything I could be besides 1,000,000 seconds old confused the heck out of me. :)
That said, pretty cute. I like it. You could make a cute viral Facebook app out of something like this (though maybe with less nerdy milestones).