Chase Camera

How easy would it be to implement a "Chase Camera" of sorts.

Say, you've got your hero map, not unlike the "WarChasers" map that comes with Reign of Chaos. I'd like to position the camera so that it's directly behind the character at all times. So, if the character turns left, the camera follows and always is viewing what the little character-guy would be viewing.

I understand that there would be issues with the camera in game. This particular type of camera angle would most likely end up disorienting someone during battle. So, the more flexible the solution the better.