Beeper Mini is (partially) back. From their blog:

Make no mistake, the changes Apple made on Friday were designed to protect the lock-in effect of iMessage. The end result is that iPhone customers have less security and privacy than before.

I’m all for openness and interoperability, of course, but using a company’s private API in a way that competes with that business is not okay. Even so, I’m kind of rooting for Beeper to shake things up.