Great question nowwhat.
Steve, your comment raises an important issue, well, to me anyway. :)
Jesus was supposed to be the most powerful, important creature to ever walk the earth, the son of God. Why wouldn't EVERY word that came put of his mouth be recorded to help all of humanity? This was our one big chance in history to get the answers to everything we have always wondered about.
They could have asked medical, scientific, philosophical questions- anything at all.
Jesus could have even given some simple advice like: 'hey guys, you might want to start boiling water before you drink it'. That single bit of advice would have saved more lives than the lives lost from every war in history- water-borne disease is still the number one killer according to WHO.
There are so many questions Jesus could have answered but it seems no one thought to ask. That seems kind of weird.