San Francisco - Boing Boing, an influential blog that covers science and digital culture, on Wednesday announced a redesign of its site that adds a new section on Gadgets, and reinstates reader comments after a four-year absence. Boing Boing Gadgets will feature a daily stream of reviews on consumer electronics, games, and related geek gear, and will be led by former Gizmodo editor-in-chief Joel Johnson. Boing Boing said it hired Teresa Nielsen Hayden, of the Making Light blog, to moderate its new comment threads. Boing Boing attracts 2 million unique monthly visitors, and claims over 3.3. million subscribers to its RSS feeds.