Hypertext Fiction Recs?

I've (perhaps foolishly) agreed to supervise an Applied Communication student's final project - he's doing a hypertext fantasy. I'm familiar with the medium, of course, but can't really claim any deep knowledge - I think the student, who has taken some courses in it, knows more than I, but he really needs my "English" credentials to see to the quality of the writing. The fact that I know something about hypertext and a lot about fantasy makes me a reasonably good fit, though.

But I'd like to be able to recommend either or both some good examples of the medium and perhaps some names of people doing theoretical work on hypertext. The student's work on it was about ten years ago - he actually learned Hypercard (boy, how far we've come, eh?) - and I'd like to suggest some more up-to-date material. Any suggestions?