There was a fair bit of info kicking around a couple years ago. You might want to scan this thread....
http://www.halloweenforum.com/halloween-props/92294-pics-new-led-pin-lights-everyones-buying-4.html
Check post 62 there for one. Otaku has wired his up to a 9-volt. I also remember someone came up with a way of using...a hunk of dowel and thumbtacks to get around the soldering part. Let me see if I can find it.
http://www.halloweenforum.com/halloween-props/92294-pics-new-led-pin-lights-everyones-buying-4.html
Check post 62 there for one. Otaku has wired his up to a 9-volt. I also remember someone came up with a way of using...a hunk of dowel and thumbtacks to get around the soldering part. Let me see if I can find it.