I thought about getting one, because I agree that it would be great to have a portable device the thickness of a magazine rather than multiple thick books to carry around.
However, most medical textbooks are not available on the kindle. And it being a black and white screen means that graphic stuff in textbooks may not be as easy to understand. That was a strike against it.
At my school our syllabi for classes are printed, but are also available on a website in .doc or .pdf form. So I could potentially put my syllabi on a kindle (you can put pdf's on them, correct?), which would be nice. However, each individual lecture comes in its own file, meaning that I would have to load up dozens of pdf files to a kindle if I got one. That's too much effort for me. If you find out that you get the entire syllabus in one pdf, then perhaps a kindle might work out for you.
Many people also like to write/highlight their syllabi or textbooks, and you obviously can't do that on a kindle. That's not a big deal for me, though. I'm not much of a highlighter, or annotator of syllabi.