In an industry that’s changing, it’s not only product that’s in flux, but the way in which the industry is promoted, marketed and reported upon that’s changing, as well. For the first time (outside of a phone conversation or over a “tall frosty one”) the Chicago Auto Show gave media, PR reps and manufacturers a chance to put a more formal face on the challenges of new media by producing its “Engaging the Blogosphere” conference. . . .