Are there consulting firms that specialize in 508 audits? Seems like a potentially lucrative field given the activist lawsuits that happen in this area.
Yes, there have been professionals offering all types of services for 508 ever since it came out. Might be wrong, but none of the companies I have seen offering these services seems notably successful as a result of their 508 services. Compliance based services are rarely a money maker, though in some situations given predictable need and clients, compliance based services are frequently a way to build relationships that lead to more lucrative deals.