Facebook Publications
Hate to bring Twitter up here. But this makes one even more puzzled about where Twitter's R&D costs of $90 million goes! Sure there are open source stuff they put up on http://twitter.github.io/ and there's bootstratp. But none of it is the sort of cutting edge research that the likes of LinkedIN and FB seem to be doing. Looking up posts on their blog with "research" tag also returns dismal results.