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I would recommend a tablet highly over a dedicated in-classroom solution because it has the flexibility of moving from classroom-to-classroom, as well as recording some dedicated online-only lectures at home (like I was just doing tonight).
Check out http://webs.anokaramsey.edu/aspaas/2061/ for the stuff I've been doing. This is for a hybrid (half-online) organic chemistry course that only meets one day a week for lecture and lab. A course like this probably wouldn't be possible without the tablet handwriting and screencasting tech.