Healthcare organizations and vendors, take note: Registration opened this week for HIMSS11s Interoperability Showcase, and would-be participants should be able to register for the Integrating the Healthcare Enterprise (IHE) North American Connectathon event by the end of the week. During the Connectathon event Jan. 17-21, 2011, systems from multiple vendors exchange information and perform the transactions required for the roles they have selected, called IHE Actors, in support of clinical use cases called IHE Profiles. Systems will demonstrate their ability to exchange data in real time at the HIMSS11 Interoperability Showcase in late February.