Yahoo! users will be able to access their personal Twitter feeds across Yahoo!'s products and properties, including the homepage, Yahoo! Mail, Yahoo! Sports, and others, letting them check in more easily on what's happening with the people and things they care about while on Yahoo!.
People will be also able to update their Twitter status and share content from Yahoo! in their Twitter stream.
Yahoo! Search and Yahoo! media properties like News, Finance, Entertainment, and Sports will also include real-time public Twitter updates across a variety of topics. Yahoo! Search users will immediately see real-time Twitter results today.
Yahoo reached a similar agreement with Facebook in December, expanding the partnership to make it easier for users to share Facebook status updates and other information on Yahoo or share Yahoo sports scores or Flickr photos on Facebook.
As a result, anyone with a Yahoo! ID will be able to update multiple social networks simultaneously.
"Let me try to capture the enormity of this integration in 140 characters or less: We're turning the key to the online social universe -- you will find the most personally relevant experiences through Yahoo!," said Bryan Lamkin, senior vice president, consumer products group, Yahoo!. "We're also simplifying people's lives by bringing their social worlds -- and the world --- together for easy access."
The Twitter integration also provides full access to the complete Twitter public data stream, which Yahoo! will use to improve the relevance and freshness of content across Yahoo! properties. This will drive deeper user engagement, and create new and opportunities for developers, advertisers, and publishers.
"The information in one single tweet can travel light-years farther with this Yahoo! integration," said Twitter cofounder, Biz Stone. "Tweets in more places brings relevance where and when you need it most."
The real-time Search integration is available immediately. Other parts of the integration are expected to launch later this year. Yahoo would not comment on any financial terms involved in the deal with Twitter.
Twitter is already having search deals with Microsoft, Google, AOL and MySpace. According to some media reports, Microsoft and Google paid a combined $25 million for the right to include Twitter data in their search results.