Document & Media Sharing
Animoto - Make videos easily from your browser. Upload pics, slides, audio, and other video clips and mash them together with this simple to use software.
Flikr - Upload and share your photos publicly or privately.
Pinterest - Upload pics in a multitude of categories
SlideShare - This site is a linked in meets pinterent meets tumblr mashup.
YouTube - Upload your videos and monetize them. YouTube pays you a percentage of the revenue they generate from clicks on the ads that are shown with your video.