Are they going to make AppleScript Studio for iPhone?
If so that will be a really neat way to make quick applications for your iPhone/iPod Touch.
you mean Xcode 3.1 ?
iPhone SDK
I don’t think AppleScript will not come to the iPhone as it’s no real language. Its more a script extension thing for existing apps. They simply make workflow faster. At least thats how it is in most cases, of course you can build real apps with it - but not on the iPhone. Won’t come 
Now that there is AppleScriptObjC, is it possible to write iPhone apps using AppleScript?
no