... Notepool was a way for me to spend $100 that I'll never get back...
That's basically the way I see it^. I think people's value of pooled notes depends on their learning style.
As was mentioned, note pool is just central notes on lectures for a course. Usually one or two good students will take good notes in a course and type them up. If you were in the class and are a good student, you probably took very similar notes. It's my thinking that I learn and remember better if I listen to the prof, take my own notes, and review them (you've probably heard those sayings that you remeber X% of what you read, Y% of what you hear, etc). My attendance is pretty good, but I just double check with a friend who takes good notes if I have a gap in one area or missed a lecture.
Then again, for someone who skips a lot of lectures or doesn't pay attention, then subscribing and reviewing a note pool or listening to the recorded lectures might be the only way to pass in courses where the professor tests heavily from hints and info he provides during lectures.
Note pool might also be nice to cross-reference if you are a student who tries to write down every single thing said in lecture.
Barry uses Blackboard for professors to post syllabus, lecture PowerPoint files, announcements, grades, etc. Almost all professors use it (a couple adjunct profs don't yet but should next year). I know DMU uses BB too from browsing their site; I'm not sure about the other pod schools...