I know this is somewhat off topic, though it has come up a couple times since Red Hat bought the whole suite from Netscape... http://www.sun.com/smi/Press/sunflash/2005-11/sunflash.20051130.1.html Looks like Sun is open sourcing JES (which includes the mail and calendar server as well as the directory server). My hope is that someone picks this up and adds caldav support to the calendar server, spuring the caldav efforts on clients like Mozilla Sunbird, Evolution, etc. Between FDS (which seems to be improving more steadily than Sun's DS), the JES Calendar + caldav, and JES or other ldap aware mail server software, I see potential for a real Exchange killer :) - Jeff