My personal opinion is that they are a great idea. I could use one or two of them, easy. I have wired volume controls in several locations in my house, so the idea of spending five minutes with a level and a screwdriver putting up a control pad next to them without having to string more cat 5 and buying another central controller is *very* appealing.
Do you have a good feel for when they'll be available? In the past I've tried not to get too excited about these things just because they tend to come out so long after the announcement.