Great site for posting presentations and also posting presentation on a webpage. The presentations are on a shelve. I just started using and love it. It is easy to use and you can just upload PPT, DOC, RFT, EXCEL, etc into it to get the page turning book effect. Plus, links in the presentation are active. This is a new must know site for any educator or preofessional developer that uses technology regularly. You can view some education samples I put up at http://en.calameo.com/accounts/285487 if you are interested. Plus, it has very detailed user controls.