I like the option I have in Epic Citadel to either tap where i want to go (like a mouse-click on Diablo) and then swipe to look or use the two onscreen move/look controls, the former was the most comfortable and the latter was useful for finer movements.
Another game that I've enjoyed controlling recently is the gyro-update of NOVA. Both that and Epic Citadel have given me more faith in the controls of future high-end iPhone game, hopefully bringing them more into the fore now everyone's had enough of touch/tilt mini-games.