You’ve gotta love a site that’s up front about the true spirit of the web. “Welcome to Kill Time Central!” it boasts. “We’ve been busy adding new stuff so you’ll never get any real work done.” Whether or not you’re a fan of “Car Talk,” the irreverent public radio show hosted by two wacky brothers (and about cars, of course), you’re likely to have a fun time at the show’s home on the web. The site’s got audio highlights, opinions on the latest models, service bulletins, and lots more. The FAQ answers questions such as “Are you two married?” (“No, we’re brothers”) and “Do you have kids?” (“Of course we have kids. Who do you think takes out the garbage?”).