We’re here today at Facebook’s headquarters in Palo Alto, CA. But it’s not a Facebook event. Well, it’s not totally a Facebook event. Venture capital firm Kleiner Perkins Caufield & Byers has summoned the press here for an announcement. What will it be? Judging by who is here, it seems a lot like a new kind of fund. Sure enough, there’s a sign. It will be the sFund.