What I don't like about Dead Island is that they are going in the direction of L4D too much. Big boss level zombies and what not. I thought it was going to be more like the atmosphere of Dead State. More "real" or traditional zombie canon.
Have any of you tried Fatal League yet? It's a strategy RPG for the iPhone. No eyecandy, old-school, turn-based. Definitely hard. I found it in AppStore's 'New and Notable' over the weekend. There's a free version.
For iPhone, one of the best 2D old style action RPGs I've played in ages is Exitium. It's large and has loads of features like player to player trading of crafted and found items, great looking, real easy to pick up and down again, or just spend hours doing at a time!