Hi and welcome back to whiteboard blabber! I've been reading up on electronic whiteboards this week and am really impressed at how versatile they are. Not only do they work alone, they can be hooked up to computers and DVD players. From what I understand, some schools are replacing their old wall mounted TV's with electronic whiteboards (do they hook up to cable???).
Though I don't usually reference Wikipedia, I found an interesting article about electronic whiteboards there. It discusses everything e.w. from what they are and how they are being used in the classroom to available accessories (stands, printers...even student response systems, a.k.a. clickers!)and number in use.
Check it out: