Social networking idea

Here’s a suggestion for the various social networking sites out there: give me a way to introduce someone to someone else. Here’s the idea: I have two people in my network. Today, any of the social networking sites waits until a user initiates a request; that request comes to me, then I decide to approve it or reject it.

But what about a connection I want to initiate, instead of simply facilitate?

I’ve really come to like LinkedIn for its ability to grow and manage a professional network (it’s more explicitly business focused than more sites like Ryze, Tribe, and others). And this idea would change LinkedIn’s model (since I don’t have any other way to conclusively establish that two users are connected directly to each other), but it seems that the function would be sufficiently useful that it’s worth exploring…