_I'm reposting my comment that I posted to the blog._ The alarm clock would need to run on the server and trigger a notification on the iPhone. There is a ver

_I'm reposting my comment that I posted to the blog._ The alarm clock would need to run on the server and trigger a notification on the iPhone. There is a very slow task manager that can execute code: Me. Your service that is sitting on your server would push a notification. A dialog pops up on the iPhone. The user touches a button on the dialog box and task switches to your application. Having shipped games on the Sony PSP, what you are proposing is a very, very bad idea. Background processes are a bad idea for memory-constrained devices that need 100% uptime. The iPhone does not page out to disk and it has a limited amount of RAM. These resources should not be handed to background processes. Note that the iPhone notification system works just like the notification system for the XBox 360.