To-ing and fro-ing about whether Facebook / Microsoft are a threat to Google.

Some good comments, especially this one : everyone thinks the MS deal is about getting Facebook customers to use MS search technology.

But what if it's the other way round? Bringing FB technology to MS customers? For example, what about a deeper integration of Facebook into Internet Explorer? Or Windows? That point about Facebook needing no UI "metaphor" is telling. Why shouldn't a computer desktop be organized by a Facebook (or similar) social-network metaphor?