Update:We now have full-featured mobile apps for iPhone, iPad, Android, BlackBerry, and Windows Phone here.
The earlier announced Zendesk Notifier for iPhone is now available in an App Store near you.
The Zendesk Notifier allows agents to quickly see how many tickets they have assigned, and how many new unassigned tickets exist in their help desk. It also serves as a short cut for logging into the application from the iPhone.
We very much look forward to your feedback. The app is intended to be a shortcut to the iPhone optimized Zendesk web interface, not a complete help desk app in itself. But let us know how we can make it even more useful, and stay tuned for updates!