I've wanted a simple talent template addon that works similar to the one found in Guild Wars, and a friend last night finally convinced my to just write my own. What this addon does is allows you to save your talent tree into a template, so if you want to return to that spec later you simply load the template and voilą, your talent tree is filled (Only fills preview, that way you can make a few changes if you want).
Templates are saved per class, so you can access them on any other character of the same class (for you crazies who have 3 85's of the same class. ).