[schof]

What areas are ripe for this sort of consulting? (Ignoring the fact that if you go into an area to make money rather than because you're rabidly interested in it, it's probably a bad idea.)

It seems there are two characteristics that would make an area ripe for this -- companies needing it badly, and some (real or perceived) barrier to entry that keeps legions of geeks from learning it.

Any other likely candidates?