The latest news in the SEM industry is Yahoo's new deal with Google. Three-year deal to put Google's results and ads into some of Yahoo's search results, Yahoo will have the ability to show search results both paid and organic from Google search results. Under the Services Agreement, Yahoo has discretion to select which search queries to send to Google and is not obligated to send any minimum number of search queries.
What does this mean for my paid search?
Continue to do PPC with Google and Bing. If you max out on search volume and spend then consider Yahoo! Gemini however understand that Yahoo! Gemini will be playing a very small role in the paid search results supplied by Yahoo!
What about mobile?
Yahoo! still has a deal in place that 51% of all mobile search results must come from Bing. The other 49% will be a combination of Yahoo! Gemini and Google.
When did this partnership begin?
The agreement between the two companies went into effect on October 1, 2015. The term of the three-year contract runs through December 31, 2018, and is presumably subject to renewal.