Vkontakte for iPhone [AppStore, Free]

Famous russian social network VKontakte created an iPhone application.

The VKontakte application allows you to stay сonnected and easily share information with your friends. You can use iPhone to send and receive messages, check your friends' updates, and upload mobile photos to VKontakte from anywhere at anytime. You can also find your classmates from school, college or university and copy their profile information to your contacts.

Free via AppStore (link).