He'd just have to lay down the two transition points, and then add in a doorway or permanent spell animation to make it look usable. And, one step further, the DM could create the teleport runes you guys mentioned, so that the player could place one item in one location, and use a matching item to instantly bring him to the placed item. And the crazy thing is that non-programmers like me could pull that stuff off with about 5 minutes of free time. These special roles offer abilities and powers otherwise inaccessible to PCs and focus them in specific, interesting directions. A character with a prestige class will be more specialized yet perhaps slightly better than one without.
Some examples are the anti-paladin and the assassin.
By applying Quicken to a spell, the casting time is reduced to zero. Another option for rapid casting is contingency. The spells still take the normal casting time though. We're going to have to look over this for playability a little later on and figure out a good way to show queued actions. You can attach so many criteria and abilities to a weapon it blows my mind.