I HATE when a website asks me to register for something, takes all my details, validates my email, makes me jump through hoops, THEN tells me the service is not available outside the USA.
If you only serve Yanks, tell me BEFORE I waste my time.
One example from many:
A very cool little mobile application called Jott.
You call the number from your mobile, dictate a note and it emails the message to you and/or your friends.
If you’re in the USA, check it out. If not, save your time.
And if you’re a web marketer, a thought:
Don’t piss off people you haven’t got around to serving yet.