In the 2004 United States election, US citizens were able to egister to vote in real world presidential and local elections by going to the US Voter Registration Center in Kantana, pictured below. Residents of most states were able to register, except for North Dakota, Wyoming, and parts of New Hampshire. They could also express their presidential preference on the voting sign, and make a donation to their favorite candidate.
(click on the picture to enlarge it)