Mathew Ingram predicts that Twitter and other stream-based social media sites are in danger because their users are becoming overloaded. Sure, you can prune your "following" list, but "it’s like cleaning out the garage or indexing your photos; you know that you should do it, but it just seems so daunting that you never get around to it." Also, Paige Brown reviews a study on building relationships through Twitter. Rule one: Reply and engage.
