The Problem:
Vocational rehabilitation is an important part of the workers compensation process. There is not a particularly good way to find a good vocational rehab counselor.
The Business
A complete online directory of vocational rehabilitation counselors.
Doableness
Very easy to start and easy to set-up. Getting the listings is slightly more difficult, but only slightly.
My Thoughts
This is an industry of one-person businesses. That makes it ripe for something like this. You can monetize by selling advertising, selling directory listings (advertising) and/or showing these voc rehab counselors how to get set-up online. All in all, pretty simple.