I figured out a way to adapt an existing iPad dock to allow horizontal viewing. Target, Walmart, and other places sell these great wall hooks... http://solutions.3m.com/wps/portal/3M/en_US/Command/home/
I bought a set of the small wire hooks for $2.94 from Target. Adjusted the angle of the hook to match the ipad dock angle and attached them to the back of my iPad dock.
They work great! Plus its not permanent! Check out the pics and leave a comment if you end up using this.