Altered Books is a neat project to create art and poetry by selectively vandalizing the pages of books.
Also via scribblingwoman.
A couple of lovely animated poems:
About the Other Animals is an elegant, powerful poem about the creatures denied passage on the Ark. It is featured in Born Magazine, an "Art and Literature Collaboration" showcasing a collection of interactive media projects.
Via grow-a-brain, via scribblingwoman.
Ode to Summer is probably not strictly speaking an animated poem, although it is about a poem. It is a gorgeously animated gem of a film by Ron Hui which brings Chinese calligraphy and painting to life.
UPDATE: LadySusan has pointed me to the excellent altered-book art of Tom Phillips. You can also see his "treated book," Humument, at its own site, www.humument.com. Cool stuff.