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.
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.
"Archived course Web sites presented "as is," including student work good and bad, sections left un-updated, and typos." Attractive and useful pedagogical use of Internet in teaching.