vBrownBag TechTalks at VMworld EMEA 2015
If you're not familiar with them, these TechTalks are 10 minutes long and given by anybody from the virtualisation community with something interesting to share. So, if you have a gap between sessions or there's something of interest on the TechTalk schedule (this is published closer to the time) then they're well worth listening to.
Of course, it may be that you have something you could talk about for 10 minutes. If so, why not propose a session using this Google Form?