Usernames under 5 days old are green; part of PG's experiments on Hacker News to prevent dilution of the community. See http://news.ycombinator.com/item?id=243

Usernames under 5 days old are green; part of PG's experiments on Hacker News to prevent dilution of the community. See http://news.ycombinator.com/item?id=2434333 http://news.ycombinator.com/item?id=2434333 and http://news.ycombinator.com/noobstories http://news.ycombinator.com/noobstories