Yahoo! and Twitter have agreed to integrate their services, allowing users to update their Twitter feeds from Yahoo! and adding live tweets to Yahoo! search and media results. The move will effectively turn the Web portal into a Twitter client, and add Twitter results to its e-mail service. "The information in one single tweet can travel light-years farther with this Yahoo integration," says Twitter co-founder Biz Stone. "Tweets in more places brings relevance where and when you need it most."