Update (3/19/09 @ 2:50 PM): The Scripture index has been completed. (Piece of cake. Um, but not during Lent. Piece of bread.)
Update (3/18/09 @ 9:45 PM): I've got all 598 questions loaded. The only thing missing right now is the Scripture index. Maybe I'll have that done by tomorrow night. It's pretty simple, from a programming point of view.
I have been working on a tool which searches the Compendium to the Catechism. I don't have the Scripture-index composed yet, but I have loaded questions 1-299 (out of 598). In the next day or two, I expect to have all 598 questions loaded. Then I will build the Scripture-index. This should all be completed by this weekend.