UPDATED: Play Random Album v3.1
Play Random Album scans your library, creates a playlist of a complete single album choosen at random and begins playback of the playlist created. Works great when assigned a keyboard shortcut.
This version works around a problem with iTunes 11 whereby after starting to play the first track of the new playlist no additional tracks appear in the MiniPlayer/Up Next and only the first track ever plays. The script now waits until the playlist is completely assembled before starting to play it.