open source or sample Apple Push Notification Provider app out there in ObjC or C ?

Hi

I have gotten involved at the last minute in an iPhone project where we =
would like to add push notifications (convention app -- want to push out =
last minute announcement notifications).  The client side is no problem =
but from a time perspective we don't really have time to build a =
provider app (the part that pushes TO the Apple servers and maintains =
the registered device list etc).  Does anyone know of any open source or =
sample projects that implement this sort of thing in ObjC or straight C =
that I could use as a foundation to build on?   This all has to be done =
and working by first half of next week and I cannot get on to it until =
Saturday due to previous engagements so I thought I would see if I can =
build on existing sample code.

Thanks
Chad