My wife takes classes at a local university, and they have recently started using the iclicker. She got hers today, and I immediately started scheming. It's $40 so I don't really want to go out and buy another one just to take apart, but it's still pretty tempting. All in all, I'm fairly disgusted by the whole thing (especially since I'm sure her uni is making a bit of a profit off selling her this thing). She has to go to their website - the company's, not the university's - in order to tie it to her student ID. Looks like it might be susceptible to jamming, at least (maybe a modified 900MHz cordless phone?). Unfortunately, my wife won't let me take hers apart, but it might almost be worth sinking $40 into it to see what I can do with it. Of course, I wouldn't use my knowledge for Bad, but I wonder how much thought has been put into this thing's security? It's tied to your student ID, after all.