You can now finally access my recorded presentation Exadata Smart Scan: What is so smart about it? Oracle University Free On Demand Mini-LVC 

We used the same WebEx platform as with our Live Virtual Classes for that one hour event, you may notice every now and then a question, asked by one of the attendees. Unlike with most LVCs, there is no practice environment present here, though.

I did that during lunch break of an 11g RAC course in Manchester, by the way.  The slides are here for download also.