I own an IT services company and we have a medical vertical. There is a demand for this and I am a big fan of what you are doing. What I can tell you however is that no amount of iPad UI wizardy will overcome the hairball that is EMR/EHR. Table stakes are Meaningful Use certification and assurance, HL7, Labs, PACS, HIS integration and the list goes on and on. The hardest work happens there, and Dr. Chrono will need "street cred" there to grow.