I’ve got a new app for players: i4e
cordax.net/i4e

First let me be clear that i4e is NOT iplaye4e. Next, I have actually tried entering one of my own 2nd level characters and used this app to play. 

I have a review for a D&D iPhone App that I really like: DM's Tracker by KBAR Apps

http://www.kbarapps.com/dmtracker.html

When I first tried out the app, I was impressed and excited to use it. I've used it quite a bit since, including the games I ran at GEN CON, and I like it. Personally I prefer it over iNit, the only other DM tool available for the iPhone.

First of all, the app doesn't have any obvious bugs.