Exclusive: Yahoo’s Marissa Mayer Officially Joins Jawbone BoardExclusive: Yahoo’s Marissa Mayer Officially Joins Jawbone Board As I had reported last fall that she might, Yahoo CEO Marissa Mayer has officially joined the board of Jawbone, the high-profile wireless gadget maker whose nifty products include Jawbone wireless headsets, Jambox speakers and the Up personal fitness wristbands, according to sources at the Silicon Valley Internet giant. Mayer has alre
