I remember those, also.
Q: What did Commander Scobee tell his wife before he left?
A: You feed the dogs, I'll feed the fish.
Q: What was the last thing that went through Commander Scobee's mind during the explosion?
A: A piece of the dashboard.
I remember hearing afterwards that most of the "quick" jokes that came out, came out of the trading floors as both a coping mechanism and as a way for the stock traders to have something to open a conversation with people ("a new joke"). If true, then at least its something they provided that all the new automated trading systems can't (quick, tasteless jokes).
These were incredibly tasteless (all of them), but its interesting how quickly they came out as part of the human coping mechanism to deal with tragedy.