Microsoft Launches 'so.cl' Network

benfrog writes: "Microsoft just quietly launched so.cl, its own sort-of-clone of Facebook, Google+, and the like. It also pretty much sponges off of them, in that you can log in with your Facebook ID and it will contact your Facebook friends if you want it to. They've also (wisely?) put Bing Search at the center of the (currently invitation-only) site."