Jobs said that the FaceTime protocols will be an open standard so one should expect it to show up on other devices, but we need to know if the front facing camera APIs will be available to 3rd party developers in iOS4 so we can have Skype and google video chats. You'd think he would've mentioned that too.
On the Evo we've already seen a few 3rd party apps that use its front camera, so let's hope iPhone 4 offers the same. I wouldn't be surprised if we were limited to Apple's native app until the next iOS update though.