Edmunds.com today announced that 21 of its automotive videos are now offered as free podcasts on the iTunes Music Store. Sponsored by Nissan, the video podcasts feature road test reports on vehicles such as the Lexus IS350, the Honda Civic Si, the Nissan Titan and the Porsche Boxster S. In addition, vehicle comparisons include the BMW 330i vs. the Audi A4 and the Mazda MX-5 vs. the Pontiac Solstice.