The British Library just announced digitising with Microsoft, who help out OCA, who in turn use Creative Commons licensing, as an instrument to help preserve author sovereignty for rights questions. Yahoo, Adobe and HP are other major partner.
Google now offers a “Usage Rights” category in their advanced search, which finds works that may either “allow some form of re-use” or “can be freely modified, adapted or built upon”. But they don’t mention CC, and it’d be interesting to know whether the see Open Content more generically, including the GNU FDL. But alas, Google says nothing, as usual.
Meanwhile, Yahoo (who has offered CC search for 15 months!) announced 60 million backlinks, pointing to 60 million CC licences on the internet.