Listeners' comments (more 50th show congrats; do one topic; intercontinental collaboration; a milestone and keep going; the word is getting out; seeking PR feedback; more on blog design and usability; the power of the blog for customers; monitoring and tracking blogs); Adrian Melrose and his Land Rover, continued; advice from GM to would-be bloggers; business scandals at Volkswagen and Infineon; LA Times and ethics guidelines; what's up with Technorati?; FeedDemon on beta test.