Many thanks to all who have replied - I really appreciate it. I still don't know what I'm going to do, but just hearing from those who've been there really helps. I guess I feel that at some point, he will quit lessons (as much as I don't want him to), but I'm going to keep him going as long as I can.
I started lessons at around age 9-10. I took for approximately 4-5 years. I did not get the instruction my children are getting though - it was pretty much just learning the notes and timing. Not to toot my own horn, but I come from a musical family and it comes pretty naturally to me. I can still pretty much sit down and site read anything (you can just tell I'm rusty from little time to play since becoming a mom!). If my son is like me, maybe after a year or two more of lessons, he will be able to play well enough to play whenever and whatever he wants to. If either one of my children were to continue piano in college and/or make a career out of it, I see it being my daughter - she loves it! Of course, she's only 10 - we'll see when she's 14!
Thanks again!