[Ezra]

If you're asking "are there potentially awesome applications of this?" then the answer is probably "yes".

If you're asking "is there anything in the wild that I would know of and uses this?" then the answer is probably "no".

Most of the prolog projects I've ever seen are pretty inbred; implementing compilers or interpreters, hooks for another language-type things. Though it must be said that I'm not deeply embedded in the prolog community.

[gommm]

In my 4th year university project we worked on an expert system for a card game in Prolog... For doing an expert system based AI, prolog is pretty good...