Today Mac OS X hints offers an easily overlooked internationalization hint. You probably know already that you can hold down a key on the iPhone keyboard to select international versions of a character (eg. Accented characters).
What you might not have know about was the regional domains. In settings, choose General > Keyboards and enable some of those international keyboards.
Next go to Safari and start to enter a new URL. Tap the globe to switch the active keyboard from US English to some other nationality. (Russian is shown here.) Finally, tap and hold the .com button. After a second, a regionalized version of .com appears just to the left of the default.