Did you get an e-mail similar to this recently?
Thank you for your interest in speaking at VMworld 2012. We received a record number of submissions this year and were only able to accept ~12%. Unfortunately, we are not able to accept your session proposal, but we greatly appreciate and value the time and effort you took to submit and we hope you will participate in the VMworld 2013 Call for Papers.
Me too. Are you still passionate about your topic and want it to be heard by the VMware Masses? Me too. So, the #vBrownBag Crew are putting together a virtual unconference, and you can sign up over here.
We look forward to having you aboard.