Novell's Open Source Collaboration Server. Novell is contributing its NetMail server code base to create a new open source collaboration server, Hula .
Hula will support CalDAV, and is currently tested to be robust and
scalable for up to 200,000 accounts with 50,000 concurrent connections
on a single Linux server. Having this kind of server resource available
enriches the Chandler ecosystem, will provide an additional alternative
backend, and make it easier to implement a distribution of Chandler and
other CalDAV clients that will be able to interoperate and share
information without relying on proprietary servers.
At a recent roundtable and interop meeting of the Calendaring and Scheduling Consortium
several vendors demonstrated initial interoperability between some
CalDAV servers and clients. Novell is a founding member of the
consortium and a supporter of the CalDAV initiative.
[Mitch Kapor's Weblog]