Custom Sounds for Push Notifications

Is there a way to set custom sounds for push notifications? I know you can do it for general things like email and apps themselves, but I would like to find a way to make each app notification have their own sound. For example, my Facely HD app is use for birthday alerts, while my Facebook app itself alerts are for status updates. They both have the same sound so I have to actually look at the phone to determine which one is alerting me. I know I could use an app like Push 4.0 but the alerts are limited to whatever apps they support. Any advice would be appreciated.