This project is fantastic. The hacker spirit is in full force, and I love a good David and Goliath story. However, all the comments about demanding interoperability and protocols keep confusing me -- I don't consider APNS a protocol (like TCP anyways), it's also not incidental, extra header space to stuff data into in an existing message being transported (ala early SMS), and it's not an open relay for everybody to use. It's Apple's private message delivery system!
Why does everybody feel entitled to use it if they're not using Apple products?
I'm not licking boots over here, just genuinely curious. I wouldn't want to set up a mail server and then foot the bill and assume liability for whatever the hell goes through it from random people on the internet.
And trust me, I'm all for civil disobedience and sticking it to the man with clever technical solutions, but given the (probable) massive costs of operating APNS, Apple's got every right in the world to close any gaps in their system and keep kicking Beeper out.. and Beeper can keep trying to get back in.. but I just can't wrap my head around making the assumption that APNS access is somehow a fundamental right that we're all being denied.