Apple’s upcoming iPhone OS 3.0 has been leaked to torrent sites ahead of its official launch on June 17 – not surprisingly given that the so-called “golden master” (build 7a341) was just made available to developers. Jesus Diaz over at like landscape keyboard orientation in apps other than Safari, copy-and-paste functionality, push notifications, improved calendar support and more. Needless to say, as with any other unofficial release, download at your own risk, and remember to backup your device first just in case something goes wrong.