I am unsure of the rest of the world but most banks in South Africa can send SMS notifications whenever transactions happen on an account. I do not think the SMS's format is standardised and that would probably be the biggest problem - getting all banks to follow a unified standard (Hey, I said this is not a small request
I must admit now that I do not have an iPhone - I am waiting with great anticipation for the Windows Mobile version... The closer we get to real-time data, the better we respond to it.
