Terminal Actived Push Notification Utility for OS X and iOS?
OS X Server integrates nicely for push notifications using APNS, but it's more focused on mail and chat notifications as opposed to sending generic notifications like a turn based game server.

It would get your Apple ID approved and be a very nice first step towards getting APNS to be ready to listen to commands from a Mac.

Here is a nice step by step article on setting up push notifications:


http://krypted.com/mac-os-x/enable-push-notifications-in-os-x-mountain-lion-server/


From there, you could use a chat hosted from your Mac as opposed to using iMessage (messages app on iOS to get messages sent with push notifications).