In most ways, other messaging technologies are superior in user interface and ease of use. The only real advantage of e-mail is its universal nature. I keep h

In most ways, other messaging technologies are superior in user interface and ease of use. The only real advantage of e-mail is its universal nature. I keep hoping we get an open source server that can federate just like e-mail, has a decent client on a couple of platforms, can handle calendars, and has some form of greeting to ask permission to send messages to a specific address (obviously override-able by a sysadmin on a "two people on same server" basis). I have been playing with workflows lately (in relation to agents) and wonder if that would be an e-mail replacement.