The following may be useful to people trying to implement software/systems that support IHE Profiles.
In addition to the information here,
<List public domain toolkits & reference implementations>
<List public domain test software & Internet test nodes>
Mailing Lists exist for all IHE Domains, most IHE Regions and most implementation projects (such as IHE Connectathons and IHE Demonstrations.
The NIST IHE Wiki is particularly useful to those implementing IHE Profiles from the IHE IT Infrastucture Domain.
OHF-dev is a mailing list with useful discussions for IHE developers.