VMware opened up a new section on their VMworld.com website. You can find and post the announcements of all your virtualization events including conferences, tradeshows, seminars, webinars, webcasts or any related activities in the conferences forum. Be sure to post your entry with full details for the community to share and VMware will add qualified events to the conference calendar. I already posted the the Dutch VMUG event announcement.
http://www.vmworld.com/community/conferences/