Our roundtable on cloud computing is coming up next week. (Get tickets here via Eventbrite: $75 each based on availability). In addition to the previously announced speakers, I am happy to announce a few more very special participants: Amazon’s chief technology officer Werner Vogels, Ning CEO Gina Bianchini, Facebook VP of Engineering Mike Schroepfer, and Jon Engates, CTO of Rackspace.

An event on cloud computing wouldn’t be the same without Amazon, which is becoming the computing infrastructure of more and more startups through its various Amazon Web Services (winner of this year’s Crunchies Award in the enterprise category). And Rackspace, through its Mosso subsidiary, is diving headfirst into the business as well. But we also wanted to hear from consumer-facing companies such as Facebook and Ning that are creating their own cloud platforms. What happens when all of these various cloud platforms meet in sky? And how does the similarity in their back-ends result in similar applications for users, whether they be consumers or enterprise users? Do enterprise apps need to become more social, or is that simply a frivolous pursuit?