I emailed Axiom today requesting info about their upcomming on-wall speakers which were mentioned on the Audioholics tour a couple months ago. I was supprised when they responded that the speakers are currently available and quoted a price. When I requested more specifications, they posted the information on the web site:
http://www.axiomaudio.com/wallspeakers_y.html
Check it out. The speakers look great, but come at about a 50% cost premium over the bookshelf versions. The cost difference, however, might be worth it in applications where astetics and WAF are a factor.