Strategic Alliance: Social Networks

Facebook is the biggest social networking on the Internet, and they are constantly offering new tools to their users: games, events, horoscope, pictures, chat and etc. They successfully create a way to retain their users logged in for a long time. How about to create a strategic alliance with them, offering LinkedIn professional profile to their networking?

This is a just a brainstorm idea, I do not analyze well enough to know if it is a smart move from LinkedIn. But the idea is to offer Facebook users the possibility to the creation/sharing of professional profiles online. The same alliance could be implemented with MySpace, Orkut, among other communities.