During the HL7 WGM the HL7 RIMBAA group (software developers that use the HL7 RIM for persistence and in memory processing) met with OpenEHR implementers (mainly: representatives from Ocean Informatics).
We found we have a lot in common when it comes to architectural and implementation approaches. See http://wiki.hl7.org/index.php?title=RIMBAA_201103_Agenda for minutes of that meeting (browse down a bot until you reach the minutes of the Thursday meeting) , and http://www.ringholm.com/column/HL7_openEHR_finally_cooperating.htm for a related blogpost. Representives of Ocean have indicated that they'll be present during the next HL7 WGM in Orlando, so we'll be organizing this joint implementers model again. We'd also like to invite any other implementations of OpenEHR to this meeting. "Reference Model" based software development - that's what we have in common as implementer communities. TTYL, -Rene

