Will Chatham has been saving all his toenail and fingernail clippings since 1983. He keeps them in a little box. He's gotten a decent amount of press out of this. For instance, there was a Weekly World News article about him in 2002. And, of course, he's gotten some attention on the internet too.
Will's special trick is a "toenail and fingernail licking ceremony" -- which is pretty much what it sounds like. He sticks his tongue in his nail clippings.
He once had a video of this ceremony posted on youtube, but he reports that the video was taken down, because youtube felt it was a "shock" video and therefore violated their community guidelines. Will responded: "in my opinion, it is completely ironic that people get grossed out by it. What is the difference between biting your fingernails while they are on your finger and merely touching your tongue to them when they are off your finger?"