Apple is to team up with Ford, GM and Mazda to allow iPods to connect to car stereos. This is currently possibly through adapters or radio connections but will be supported by a direct connection in many future vehicle models.

Read the news release at http://www.apple.com/pr/library/2006/aug/03ipod.html

It would be technically-harder to accomplish but wouldn’t it be more consumer-friendly if the vehicles offered a generic connection for portable devices rather than an iPod-specific connection?