Multiple Front-End Solutions for Email and Calendaring?

A nice comment in anotherwise boring/Multiple Front-End Solutions for Email and Calendaring?
/. thread. Dave Gilbert says :

Lets get some convergence here - please can we actually lock the
Zimbra, Open Exchange, Sunbird, Open Groupware, Kolab
(I must have missed some....)
guys in a cave without food for a while until they actually agree to work together?
For a concession I'll let caffeinated beverages in and a few computers with a copy
of all known calendaring specs.

(please toss in a couple of guys with MS programming experience so we can get Outlook
to talk to the servers).

Great idea, so what about some conference organises a "Calendaring" track. Or Maybe a devroom for next year Raph? Nils ? Anyone ?

Maybe we can even throw in some funding for the food fight afterwards :-)