Forbes on Tuesday launched a luxury-car site - forbesautos.com - sponsored by Audi, Acura, BMW, Jaguar, Porsche, among others. Most have committed to deals lasting through the year, MediaPost reports. The site offers Forbes.com content, product reviews, and expert analysis and is, for now, accepting animated gif ads as and more standard units so long as they don't imitate or interfere with editorial content, which will be both contracted and produced by staffers.