TweetTree and TweetKnot

Via a couple of tweets from @JoBrodie I was alerted to two new Twitter services: TweetTree and TweetKnot. Looking at my TweetTree details I can see a threaded view of tweets and expansions of links to resources. TweetKnot provides “a Community of Twitter users who [can] share common interest and use this as platform to share the short messages across them. Every member of community can send the message to all other members of the community“.