Indeed, even with the Internet, goods must move across borders are subject to any customs duties and tariffs that may apply. There is certainly a danger that Internet could widen economic fortunes between countries. I agree that other needs, notably health, food and basic education, are even more important in many countries around the world. But increasingly, computer literacy must be added to the list of basic requirements for countries that want to live in a modern age to prosper. Otherwise the outcome you rightly fear, growing income inequality between countries, will in fact materialize.
Internet is tied to telephone lines.
In our country it is controled by one and the only monopolist - the Ministry of Communications. Greetings to Russia in return. Moreover, in many countries outside the US, consumers must pay for telephone by the amount they use it, rather than at a flat rate, which is the case here. If internet usage is metered, then it will be discouraged. The solution is for states to get out of the telephone business and open up the market up to competition.