Add the PushNotification related code from the included AppDelegate files to your project's AppDelegate (see 47f64eb1dd for a diff)
Include PushNotification.js in your WWW folder
Add PushNotification.h/m in the Plugins folder
Add key "pushnotification" and value "PushNotification" (case-sensitive) to the plugins list in PhoneGap.plist
Include the sample index.html or just use the parts you want

Provisioning profiles and XCode4

When trying to get this plugin setup I would receive an error: "no valid 'aps-environment' entitlement string found for application". To fix it I had to do the following:

Delete old provisioning profiles from both Library + Device panels in Organizer
Regenerate new profile with APN dev enabled from the developer portal website
Make sure new profile is added to both Library + Device panels in Organizer
Manually delete my app off my device (holding till it jiggles and hitting X)
CMD+OPT+SHIFT+K (Clean Build Folder) and CMD+SHIFT+K (Clean)
Set the proper profile under Targets > Build Settings > Code Signing
Make sure 'Use Entitlements' is not checked under Targets > Summary

Notes

This was forked from the now unmaintained https://github.com/urbanairship/ios-phonegap-plugin with the endorsement of the UA engineering team