There is no way they would 'port' away from Java. JetBrains has been building this platform for more than a decade. This is what has allowed them to support many operating systems concurrently and with great results. No need for the FUD on Java. Java is really what they excel at.

Nah, why OSX only? I'd welcome them porting it to LLVM Clang, so that we can run it on all platforms with more speed and natively. Linux ftw :)

Why does it matter? You can't even notice it's java except having to have it on your system. And why is having it a bad thing? The security issues are the browser plugin, not the JVM.