narrative+history+pictures+encyclopedia; "safe, fast and fun way to learn the real story behind historic events, famous people, heroic exploits, legends, disasters, movies, plus topics of current and general interest"
how-to videos or, more commonly, audio/slideshows; useful rhetorically for both technical writing and instructional video learning; web2.0 sharing of video that is perhaps instructionally more useful than YouTube.
a very large historical archive, often from advertising, "to provide for all levels of possible viewer a visually orientated taxonomy of the ways in which pictures are used to tell stories." unique collection, also useful for many other purposes
useful for teachers making clips to analyze in class; "personalize any video with your story. With visual spotlights, you can narrate your personal videos, add captions or subtitles, or comment on any scene."
how to create hotspots with popup notes on Flickr. Very useful for image analysis and assignment requiring students to comment on social aspects or formal aspects of image; or to formally critique them.