Neat application. He’s announcing APIs today. From his site: Plum is a young, little company (no, we’re not afraid to admit we’re still small) we started because we think collecting and sharing stuff on the web that you care about, stumble across or need is really fun and useful, but much too difficult to do. While we love blogging and think wikis are great too, we don’t think either solves the problem of collecting the things you care about, and then remixing, annotating and sharing them for others to see and use.