One of the presentations that stuck out to me was the one given about twitter. It was very cool hearing about twitter from a business perspective. I also thought that Cameron came up with a very effective and interesting way of presenting his topic. Part of it also might be that I actually use twitter while the other things weren't things I was as familiar with.
Being able to watch the presentations was good preparation for me. I now better know how to go about getting mine ready and how to present the information effectively.