This subject now emerges every few weeks on this list and the conclusions are always the same. I even found the topic showing up as early as 2000 : http://lists.ximian.com/archives/public/evolution/2000-September/002485.html Here are a few clues about why there is no satisfaction in sight. First, if you have even a remote interest on the subject, go read Brent Nordquist's post on the Kronolith mailing list : http://marc.theaimsgroup.com/?l=kronolith&m=98515227031279&w=2 Here is a small but important extract : "There are two broad categories of cal/sch techniques: non-realtime (using vCalendar and email messages), and realtime (which adds a client/server, live-network protocol). - The standards for non-realtime cal/sch are pretty stable at this point, and are beginning to achieve adoption. Quite a few existing client applications (i.e., user applications such as PIMs) already support vCalendar and the non-realtime techniques. - The standards for realtime cal/sch are still in "draft" status, and it will likely be 1-2 years before they are finalized and widespread. Therefore, a solution which interoperates across multiple client applications will only be able to use non-realtime methods for some time to come." So the main reason there is still no free calendaring server seems to be that CAP is still an IETF draft. http://www.imc.org/ietf-calendar/index.html But some hardy souls are beginning to move onward anyway : http://reefknot.sourceforge.net/bootstrap-guide/ http://www.opencap.org/html/ http://softwarestudio.org/mail-archives/libical/2362.html And watch the Horde project : considering how much they delivered with IMP, Kronolith may well live up to the expectations and really take off as soon as CAP is added. http://www.horde.org/kronolith/ http://www.horde.org/imp/ For those who are still not convinced, here is a rational for group calendaring : http://wp.netscape.com/calendar/v3.5/whitepaper/
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