First of all Bob, this is a bit surprising comming from you. I would have thought you would be a great supporter of Empire, not phrased in such terms of course.
Alright, number one, not as many "poor" nations are as technologically backwards as you may think. Take for example cell phones. Nations much less prosperous than the US have a much higher percentage of the population owning mobile phones. The same is true, though to a lesser extent, for Internet access. Not that Internet access is totally necessary, it just makes the whole process easier. Direct government, or something between direct government and what we have now, could be carried out the same way that traditional voting is carried out, only more often.
The main thing here is not the technical details of registering the vote, though that is important, but rather the political and social literacy of the people voting.
Such indicators as literacy, attendance of postsecondary education and forth, while good general indiactors, do not directly judge a person's awareness and comprehension of the issues being asked. Thats why I think that political/cultural/philosophic education ought to take a far greater role in a young person's upbringing than it does today. Sure, math is important and blah blah blah, but people need to be aware of the how the world and its people function.
And, as I said, the population/international representation thing is valid, I spoke too soon.