I can recommend two very excellent people for this purpose. The first is Kristina Haymes of Mediation Marketing Institute. You can check her out by clicking "mediation marketing tips" on the side bar. She has a very interesting practice helping mediators find their niche and giving them solid advice on how to reach clients. And the second is Dina Lynch from ADR Practice Builder. You can reach her at ADRPracticebuilder.com. Dina also has connections with the Ombuds community so is a good resource for those interested in a practice in systems analysis and design.
I highly recommend both of these practice consultants because they both have strong faith in the value of ADR processes. They both have a passion for social transformation which makes them especially effective in their efforts to build practices with their clients. And they both have ADR practices of thier own - which means they know what they are doing. If you are looking for that personal touch to marketing your practice both Kristina and Dina are good choices.