We missed this announcement when it came out earlier this month, but Sofa Labs, the parent of dating site Thread, has raised $1.2 million in a round of funding led by First Round Capital. Other investors, including Sequoia Capital, Founders Fund, and Ron Conway, also participated. Thread uses Facebook Connect, so that people can identify and contact potential matches through friends. It was one of 24 companies this summer in Facebook’s incubator program, which provides funding and office space to startups building Facebook-related businesses. Most of Sofa Labs’ eight employees, including all four co-founders, hail from PayPal.