I ran into my friends from YAPI at the AADGP meeting in Vegas. I had not kept up with their new developments, but should have. I was very impressed with the new tablet interface. The whole system is designed to facilitate a paperless office and ease patient flow and communication throughout the office. One of the reasons it works so well is that it has been designed by an actual practicing dentist.
YAPI is not a Practice Management System but it integrates with existing systems like Dentrix and Open Dental. I will follow up with more, in the meantime look here for what I already wrote about YAPI.