I had the honor yesterday of presenting a keynote address on mobile social media, and the best part is I can share it. As I mentioned in the post on 100+ lessons from 100+ events, it's hard to simply upload these presentations outright since they lose context, so I've edited and annotated the presentation. Sources for images along with URLs appear in the notes field both on SlideShare and in the downloadable version.
I welcome any feedback you have. If you want to share the presentation, I also pre-shortened the URL, so feel free to use http://slidesha.re/mo_so.