Bing to Power Yahoo Search - First of Many Deals?

The Yahoo / Microsoft deal was announced this morning. I wonder if we will see more of these deals from msoft? With a Bing-powered back-end, yellow pages publishers such as Idearc and RHD, or newspapers could focus on sales and marketing. The cost of maintaining a competitive, independent local property / IYP is too great, and dooms the publisher to mediocrity and/or losses. Outsourcing the back-end and operations would enable many publishers to remain competitive and reduce costs. These deals would make sense, but is msoft likely to try to integrate more than one partner? I hope we see msoft make this a strategic imperative and aggressively recruit media partners.