Another link, suggested by Ana Falcon, that came to my mailbox in the ELTECS Latin America news list — 50 Web 2.0 Ways To Tell a Story.
I think storytelling — getting your learners to write stories, to tell multimedia stories — is one of the most interesting things you can do in a language class. Apart from the obvious opportunities for learning and using language that such a project provides, it's the creating things aspect of it that attracts me — and it's one of the best possible uses we can make of technology, as it takes much fuller advantage of the potential of technology than, say, seeing and using the Internet as a bank of images for use in class.
You want good group dynamics in your class? Get your learners to create and share something together.
The article (or wiki, to give it its proper term), contains lots of useful ideas and links, including links to audio, images and video available under Creative Commons licences — ie. that you can use without infringing copyright.
The author, Alan Levine, has the commendable rule that "the media files you use in your story have to be ones that are licensed or shared with permission to re-use". However, my suggestion would always be that your learners create their own images, audio files, etc.
The more they create themselves, the less they steal from other websites, the prouder they will be of their work; the "pride in creation" is wonderful for motivation, for wanting to learn…