"Prowl is a Growl client for the iPhone. Notifications from your Mac (or even Windows! see the FAQ) can be sent to your iPhone over push, with a full range of customization and grace you expect. Infinitely extensible From getting delivery status notifications to updates on your Torrent subscriptions, Prowl is as expandable as Growl is. Nearly every application under the sun supports Growl, and Prowl supports their message display right along with it. You can browse through the Growl application list, or explore the applications you already use in Growl. The possibilities are endless!" - Angus Burton from Bookmarklet