Honnestly, I don't see the benefit of such an app. OK, most of the time, when you're working on a project, you're on a machine. It means that you already have access to your Mantis server via the browser of your machine. So why complicating so much the life with accessing the Mantis server with your iPhone ?
Besides, when you're active on an issue, it is also most of the time linked to the source code. And I doubt you have all the source code of your project on your iPhone. You'll need to browse it on your computer, make some modifications, test, run, debug, etc... So again, since you're on your machine already, no need to access Mantis with your iPhone, it'll be such a waste of time.
Nope, really, I don't see the useness of such an app.
ti lamp, ti lamp n'arivé!
OS: Linux (etch)
Plugins: MantisGanttChart | Mantis Graphs | Source Control Integration | Subversion / WebSVN Integration