Prowl is the Growl client for the iPhone OS. Notifications from your Mac or Windows computer are sent to your iPhone or iPod touch using push. Prowl has an extensive API, which allows your scripts to integrate beautifully.
I was extremely impressed with Prowl and the elegance with which I was able to view Growl notifications on my iPhone.Aron Trimble, TUAW
Great idea. This opens up iPhone push notifications for anything you can think of.John Gruber, Daring Fireball
Best non-IM use of iPhone 3.0's push notifications yet.Matt Buchanan, Gizmodo
Probably the best $3 I’ve ever spent in the App Store.Darrell Etherington, The Apple Blog
Push notifications When a Growl notification pops up on your computer, Prowl sends it over Push.
Simple, elegant list Prowl provides a clean list of all your notifications.
Redirections Opening a push notification can launch a different application.
Quiet hours During quiet hours, only the badge count is updated. No sounds, no alerts.
Of course, there are those times when things just go bad, so you can allow emergencies through.
Send only what you want The Growl plugin can be configured to only send under conditions you specify.
Web services There are a few third-party services which can send notifications for Twitter, Google Voice. There's also a bunch of plugins.
Send links to your device Phone numbers and websites are linked inside Prowl.
Infinitely extensible From delivery updates to torrent subscriptions, Prowl is as infinitely expandable as Growl is.