On July 13th I will be at The Skills Matter eXchange on the Comet Panel for the London Ajax User Group. Details can be found here:
http://www.meetup.com/londonajax/calendar/13682478/. Sign up and come along if you are interested.
It should be an interesting event, with representatives from a number of Comet servers on the panel: APE, cometD-Jetty, DWR, Lightstreamer, WebSync, Meteor Server and of course Liberator..
A Google Moderator page has been setup if you want to add a question for the panel.