Most recently in the news for its executive exodus last week , Yahoo announced on its corporate blog earlier today the acquisition of San Francisco-based Dapper, a startup that specializes in fancy contextual display ads, i.e. ads that take what is happening on a content producer's website as a cue from what to serve up to viewer. Both Yahoo and Google have been working on optimizing contextual display ads for quite some time, and this recent acquisition is an attempt to harness the talent at Dapper, which has also figured out a realtime bidding feature for ads. This is the first Yahoo acquisition since the triumvirate of Koprol, Associated Content and Citizen Sports in May.