I'd say DemandProgress, stopping SOPA, and codirecting the Progressive Change Campaign Committee are all pretty notable as well. If you read the things people w

I'd say DemandProgress, stopping SOPA, and codirecting the Progressive Change Campaign Committee are all pretty notable as well. If you read the things people who associated with him wrote, there seems to be a rather long tail to the things he's done that are a bit less prominent than, say, Reddit.