Songbird-category-shuffle is a project mainly written in JAVASCRIPT and SHELL, based on the View license.
Category (Album, Artist, etc.) Shuffle for Songbird Media Player
Enables shuffling by metadata category in Songbird.
For example, Album Shuffle will pick a random album, play every song in order, and then move on to the next random album.
Download at http://addons.songbirdnest.com/addon/1798