A colleague of mine referred me to a site called slideworld.org. The site allows you to upload and view powerpoint presentations of a medical nature (and some not). I have found the uploads very quick and search tools and viewing extremely simple.
SlideWorld is a Powerful resource for Powerpoint Slide Presentation. SlideWorld is a web resource designed to facilitate educational process of medical professionals. Slide presentations has become one of the key ways of facilitating education and a way of communicating the new scientific developments. Academic faculties and clinicians in practice from worldwide have contributed to the web portal. I invite you to check out this resource and enhance the sharing and collaborative development of this educational resource.
Here is an example:
