Massively has a good look at an iPhone app that's a must-have for players of the space-based multiplayer EVE Online -- Capsuleer 2.0 isn't an actual client, but like the desktop app EVEMon, it allows you to monitor and track your EVE pilots from outside the game. It's also got skill queues built in (unlike other MMOs, EVE allows you to have your pilots level even while you're away from the game, so most of the strategy in leveling actually comes in choosing the next skill to work towards), a skill library, more pilot details, and even a mini-RSS feeder, incorporating a few popular blogs from around the EVE blogosphere.
The two developers of the app tell Massively that their biggest issues in developing the app were mostly by way of the limits CCP (the company behind EVE Online) places on what third-party apps can do with their info.. Most of the things they can't do are built into the game itself, and so it makes sense that a certain amount of functionality can't leave the game client (or else people might never log into the game). The app is currently free in the App Store right now, and the devs aim to keep it that way, but just recently added ads to the mix from the game's official magazine to cover server costs and bandwidth.
Finally, they say they're excited about the possibilities with iPhone 3.0 -- notifications are mentioned, and of course it would be cool to get a popup reminder every time a pilot is about to hit a skill. They're also working on a way to provide stats about the ingame Faction Warfare. Sounds cool -- EVE Tracker is still another possibility if you want to follow your EVE progress on the iPhone, but it looks like Capsuleer adds even more innovation to the mix.