I don't see any way of killing Facebook "at this point." Think about what Facebook does: It connects people, in a constant stream sort of way. And you can cou

I don't see any way of killing Facebook "at this point." Think about what Facebook does: It connects people, in a constant stream sort of way. And you can count on being connected to almost everyone you know through Facebook just by signing in (over 1/4 of everyone on the internet is on Facebook, and I imagine this fraction is much higher in The US and other English-speaking countries). How would one overcome this barrier? Another problem is that Facebook is responsive to market pressures. Despite the recent "Exodus" of privacy-aware folks being little more than a trickle, they made changes to the way their privacy works. They adapt, and any significant improvement offered by a competitor will be added to Facebook's arsenal (Tagging in statuses, for example). Finally, knowing all of this, it is much easier to simply include Facebook Connect in a social service than to leave it out. By including it, you get over that first critical-mass hurdle. The problem is that by including it, you are also putting no pressure on Facebook or increasing the drive to migrate to your service.