At Microsoft, we have a team of both internal and external vendors who spend their entire lives creating presentations for speakers like me. While the material is not always perfect, it is often a huge time saver. Unfortunately the material is not always applicable to what I'm going to be speaking on. I'm not saying it isn't good....I'm saying it's not always timely enough or pertains to the topic I'm being asked to speak on.
This means I usually spend a great deal of time culling through existing decks or researching material to build them completely from scratch. This can involve anywhere from 30-40 (or more) hours of research and dumping it into a PPT deck, followed by many more hours of fighting with Powerpoint. After that, if you like to do demos like I do, you now need to start building VMs and demos. The majority of time I'm not onstage or getting to the venue (via plane, taxi, car, or dugout canoe)...I'm in the process of creating content....all because I want you to have something that you could simply download of TechNet on your own.
As a true multi-tasker, I usually have 2-3 presentations I'm working on at the same time. One of the sessions I'm currently working on is Botnets. I think it's a huge security concern and the opportunity to really understand them and how they work, and what they do is important to defeating them.
I've seen many crazy things out there on the Internet, as many of you have, but I had yet to see an attack vector with it's own video. Check it out....it's actually pretty good.