The IETF has published the revision to iTIP

RFC 5546, iCalendar Transport-Independent Interoperability Protocol (iTIP), has been published by the IETF as a Proposed Standard. This is the revision to RFC 2446 (iTIP) which has been underway for some time. RFC 5546 obsoletes RFC 2446. See CalConnect congratulates everyone who was involved in progressing this work.