Hart's message spurred me to look at the list of Exhibitors at the ADA Scientific Sessions from June 9 to 13.
Go to this page: http://www.expocad.com/host/fx/afassanoco/17ada/exfx.html#floorplan
In the top left is a drag down list of the exhibitors, Resverlogix isn't there....but I don't know if they were ever planning on having a booth or not.