My son is racing his third year at Nastar Nationals and after an adhoc snowboard clinic hosted by some members from this forum, it was recommended that I post on here looking for some hard boots and bindings for him.
Blair's Nastar Page
He is currently in a set of size 5 Burton soft boots. (size 23). I am not sure how much he will grow before next season, but let me know if you have anything I might be interested.