What kind of information can be stored using Annotea? see Annotea Protocol description at: http://www.w3.org/2001/Annotea/User/Protocol
What kind of schema should I use for MultiMedia?: http://www.w3.org/2005/Incubator/mmsem/XGR-vocabularies/ and for images? http://www.w3.org/2005/Incubator/mmsem/XGR-image-annotation/
Jane Hunter provided a bunch of good stuff: take a look at http://pubs.or08.ecs.soton.ac.uk/4/2/Hunter_slides.pdf or http://pubs.or08.ecs.soton.ac.uk/4/1/submission_22.pdf