That great. 1.1.2 has been unlocked months ago. as far as 1.1.3 is concrned, its only a soft upgrade that will survive the unlocking process. otherwise the iphone will become a Brick! I'm using an iPhone and must say that its great! although its a little fragile.
Actually I got it from US. My brother gave me. But I think its available at around 16000 locked. You'll have to unlock it yourself which is pretty easy nowadays! You just need WiFi!