So, being completely in love with my new 3GS, playing awesome games like Space Invaders: Evolution (possibly the best shooter i've played since ikaruga on ANY platform) a thought crossed my mind:
Diablo, on the iPhone?
A port of the original game would work so well! Blizz are already in bed with apple and the iPhone, making WoW apps & shit for it and making sure their games are Mac compatible and bi-platform at launch.
The interface just suits the touch system perfectly, just like your toon follows your mouse cursor in PC/Mac-diablo, let it follow your finger in the iPhone version.
Assume that you're leading your char with your index finger, make the secondary ability (normally right mouse button) available through a tap of your middle (or any other finger anywhere on the screen) finger.
So suiting that the cursor in the original games is even an armor clad hand!
--
Finally, so Blizz make some money off of this: Make the app free (everyone loves free apps) and let it include the first dungeon levels up to the Butcher. Then - you buy additional levels in packs of three or five that are made available every week or so for some time (to prolong the experience). Nightmare and Hell difficulties to be unlocked upon completion, available for purchase? Battle.net for "iDiablo" multiplayer over WiFi? Believe it!