I'm a big fan of a guy called Chris Hoff from Juniper Networks who like me has been doing the whole security piece for too long. I've heard him speak at conferences and also read his blog for a long time.
So I sat at the weekend planning some talks I'm giving and read Chris's blog for external inspiration and came across a presentation he'd given called "Sh*t my Cloud Evangelist Says - Just not to my CSO" and the resulting notes and comments - all positive. It's a great presentation with developers and enterprises in mind and reflects on the ethos of many of us trying to make Cloud safer to consume.
I totally recommend you bookmark his site, it's a little known gem that you'll come back to in a hurry.