This is wild. Go here, put in your address and/or zip and it will tell you what Presidential candidates your neighbors have donated to, including name and address. (Via Mutated Monkeys)
It's a bit disturbing to see how the concept of the secret ballot has apparently slipped, although I can understand the reasons for it. I am, however, relieved to discover that there isn't a Kucinich or Sharpton supporter within ten miles of me.