Just a quick note for posterity:
On Tuesday 27 July 2010, at his 10-year checkup, Aidan weighed 80.7 pounds, and measured 55.75 inches. In one year, he gained 11.5 pounds and grew 2.75 inches. His measurements are still in the same percentiles they've been in since he was 2 months old. :) Even his doctor marveled at his consistency.