Of course, after making my last post, all sorts of ideas for an IDE for creating regular expressions come to mind. It would be way too much work to code, though, with not enough target users. Group A is all people who write regular expressions. Group B is all people who like using UI when writing programs. Group A intersect Group B equals an incredibly small group of people... probably smaller than the already miniscule group of, say, attractive people who play tabletop wargames with miniatures.