Web 2.0 pres tools

The presentation tools I researched were Prezi and SlideSix.  I found both presentation tools easy to use.  Prezi was interesting becasue it was good for being very creative.  SlideSix is easy to use beacuse you could upload almost anything to it.  In SlideSix, you can add your voice into a slide as well.  I am interested in trying both as well as showing them to my colleagues.  i would recommend both of these presentation tools to try out.