When MetaFilter's down, parallel-universe websites like Orkut contain valuable information as well as friendly confraternization - witness the MetaFilter board on the same website. Plus you get photos and intimate details of your favourite MeFi posters, whether friends or foes. How important are these parallel-universe network sites? Is Google's patronage indicative of things to come? And, yes, should we take over while it's hot? Does anyone want to be invited?