Now this seems much more interesting to me than the iPad for a digital signage appliance. Inexpensive, open source, open, open, open. You get the idea, I am stuck on "open" as I don't want Apple dictating what I can and cannot do with their device. And I am especially stuck on appliances that are intended to leverage HTML content and web services rather than local, client side proprietary applications. Watch the video, very entertaining, must say Michael Dell handle the interruption incredibly well.
Update: for more on the closed iPad see Ipad is Ibad.