Microsoft is officially mum, for now, but AllThingsD.com's Kara Swisher reports this morning that the company has struck separate deals with Twitter and Facebook to integrate feeds from the social networking services into Bing results.

The deals are expected to be announced this morning at the Web 2.0 Summit in San Francisco this morning, where Microsoft Online Services President Qi Lu is expected to speak starting at 11:30 a.m. Swisher says an on-stage demo is a possibility, so we may soon have a better sense for how the integration would work, providing a better indication of the potential impact on the market.

Notably, the deals are reported to be nonexclusive, so even if they do provide Bing an initial advantage, Google apparently wouldn't be precluded from matching the features at some point in the future.

Stay tuned for more details as they're available.