Prowl is a Drupal module that provides support for Prowl, which is a push notification client for the iPhone. It relies upon ProwlPHP.

Installation:

After downloading the module and placing it under sites/all/modules in your drupal directory, you must download the ProwlPHP class from the ProwlPHP site and place it in a directory called ProwlPHP in the prowl module directory.

If you have a shell prompt, you may run this command from the prowl module directory:

mkdir ProwlPHP; wget -O ProwlPHP/ProwlPHP.php "http://github.com/Fenric/ProwlPHP/blob?path%5B%5D=ProwlPHP.php&raw=true"

Once you have installed ProwlPHP, simply go the modules page, enable the module, and then visit

/admin/settings/prowl

You will want to enter the your API key on the settings screen, which you can get from the prowl site.

Using the module:

Out of the box, the module can notify you when there are core or contributed module updates available for your Drupal installation. To get more interesting custom functionality, you will want to create actions. To save writing out lots of steps, I've made a short screencast which shows how to create a custom action to send push notifications when new comments are received.