Who's going to babysit the iOS push server? Colloquy already has this and I modified an IRC server to support it but the push server is down so often it's not usable. I'd run the push server myself but Apple requires that I pay them $100/year, buy a macintosh, and convince them my version of the app is substantially different all for the privilege of maintaining a service required to support their miserable OS.

EDIT: ah, of course it's Android only.

EDIT2: They absolutely are Apple problems. Unfortunately Apple has convinced their users that they are IRC problems and the practical reality is that Apple users will not use IRC unless they're fixed which for me means setting up eg MMS bridges with cheogram which is a major pain. Thankfully we're getting web push on iOS next year and that will (hopefully) make all these problems effectively go away.