Last month, Microsoft and Google both announced that they would be adding Twitter to their search results.  Now Yahoo, whose search engine is driven by Microsoft's Bing, will also jump into the real-time search ring.

Yahoo has reportedly paired with OneRiot, a real-time search provider.  The company will be trialing OneRiot's results with approximately 10 percent of its users.  The trial would provide users with a new "search shortcut" on Yahoo's homepage, which would lead to real-time results on the top of the returned search results.

Describes Yahoo, "The shortcut will only appear on certain queries that will be determined by Yahoo. This is a test designed to discover if showing such content is useful to people."

Exactly how the relationship between Yahoo and OneRiot will play out remains to be seen.  The pair hasn't signed any long-term deals and the current partnership does not include any revenue sharing, according to sources at The Wall Street Journal.  Complicating the arrangement, according to Yahoo Chief Technology Officer Ari Balogh, Yahoo will also have access to Microsoft's real time data.  A Microsoft-Yahoo-OneRiot partnership does remain a possibility.

OneRiot currently has 3 million users and has raised over $27M USD in venture capital.  The Twitter-search startup is based on Boulder, Colorado.