I am in the process of starting one. There are a lot of issues around what you are offering; the barriers are varied and many. But they are all surmountable -

I am in the process of starting one. There are a lot of issues around what you are offering; the barriers are varied and many. But they are all surmountable - though you need to take a shotgun approach. For example - if you went to Health 2.0 yo would have noted several things: 1) the founders of health 2.0 are money hungry and unscrupulous 2) everyone was focused on the silo of the PHR 3) The small practice iPad application space is really crowded 4) big EHRs are walled gardens - big monolithic gorillas with no interest in partnering or providing data via HL7 compliant channels 5) EVERYONE suffers because of this. 6) the secret killer in the space is Cisco. Typical hospital IT organizations are either HUGE (kaiser) or outsourced and incompetent (Eclipsys / Perot) or in-house and understaffed (city/county like SF DPH/DPT) What specifically are you interested in?