OpenSIPS project is registered to participate the 23th edition of SIPIT - SIP Interoperability Test event in Lannion, France, October 13-17, 2008.
Compliance and interoperability are essential parts of project testing and participating to such large testing events is a natural step in the QA process.
If there are people interesting in being part of the OpenSIPS test team, please let us know (via the users mailing list).