Thanks to Tristero over at Hullabaloo, I discovered the best site for overseas US citizens to organize their vote. It's called the Overseas Vote Foundation and they provide the most user-friendly way to register and to receive your absentee ballot.
I don't know about you, but I find it a daunting prospect to call or go to the US Embassy here in Rome. Maybe it's easier in other cities, maybe it's the Italian civilian employees, maybe it's the over-the-top security procedures they have in place, whatever. It could be me. I have such a distrust of government still, and let's face it, at the US Embassy, government is right in your face, from the Marine guards at the entrance to the pictures of President Bush in every room.
In any case, I registered to vote just now, first time ever.