I didn't mean the first thing you mentioned, more like the second. Mostly I meant that you can already buy enterprise social networking suites complete with instant messaging. My post must have been worded badly as it seems to have confused people. My comments about Facebook and IM were in response to a post that suggested there was some technical difficulty in archiving and searching IM and social networking style posts. Obviously, there is not, because Facebook already does it, and similar capability exists within iChat itself! It would not be difficult for a vendor to provide an integrated social network with IM to enterprises, and indeed, there are vendors which do just this.

I disagree that there is no market for this. Jive's S1 says they have 15M enterprise users spread out over 600+ companies.