GoVote wants to make sure you know how, where and when to vote. To find out where you should vote just enter your zip code or campus. GoVote will then show you where to vote on a Google Map and even tell you what day to turn up.
GoVote allows anyone to access their database via XML feeds so anyone can create their own mashup. It also allows user editing, so if you notice missing or out of date data, you can add or edit the information. The site is also available in English and Spanish.