jwrape, I've got the same squeak behind my steering wheel too.  Must have been a special option that I didn't know about on '92 and '93s.  I've tried tracing it without any luck.  Usually happens when driving slow over rough terrain that causes the jeep to flex a little.  I know it's not the steering shaft because I've recently had it off and freed it up to slide in and out without binding.  If you find it before I do, let me know and I'll do the same.
Matt