Looks like the venture funding is still flowing for Facebook applications. The immensely popular Friends for Sale application has received $4 million from Lightspeed Venture Partners. At its basic level Friends for Sale doesn’t really have much of a business model but they are currently one of the most popular games on the site. So what does this new round of funding mean? It means that we have a new serious competitor in the world of social gaming alongside with Zynga and Social Gaming Network.