an early happy birthday to your son (and the way time flies it won't be long). Congratulations on you and your son's incredible journey and way to go following your instincts
my oldest turned 7 in april 07. he was still nursing at least once a day. but once summer came along, we were busy with swim team and other things, he really tapered off. i think the last time he nursed was on a beach camping trip, when my youngest turned one (end of july 07). about a month after that my son still hadn't nursed so i took just him out to dinner to celebrate our nursing experience. that last year of his nursing i was nursing 4, so to have one actually wean was a little weird. the 2nd pretty much weaned about 6 mos later. he was only 6 1/2.
my 3rd is 5 and still nurses daily (twice) so i figure she'll at least nurse through kindergarten. i'm pregnant so the milk isn't always abundant