Yahoo (NSDQ: YHOO) recently shut down its fledgling social media site Mash, but that didn’t derail all of its social media plans. Today it launched a unified profile feature that lets users access (and eventually control) their various social media personas across the Web.

It’s part of the company’s “open” strategy (Y!OS), which gives developers and other third parties access to a number of Yahoo platforms through a set of APIs. The strategy has already spawned two search plays, Yahoo BOSS and Search Monkey, each with varying levels of customization. Users of Yahoo Messenger 9.0 have already started seeing some of the profile integrations, as the IM client pulls in their friends’ Twitter, Yahoo Buzz and Mybloglog updates. Deeper integration into Yahoo Mail is slated to come next, as well as a customizable homepage. 

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