Google and Facebook can’t help you find which of your friends are single, or live in New York and like Radiohead, but Ark can. Today Y Combinator-backed Ark.com sails into private beta in hopes of becoming the best place on the web to do people searches. With a variety of layer-able filters, Ark lets you search through public profiles and the private data of your friends across Facebook, Google, LinkedIn and other networks. It’s also got filter sets for easily discovering old classmates and new business contacts.
