PadMapper obeys robots.txt's, for the record. Also, it doesn't repost their content, it reposts facts about the content, which is a pretty key difference.

They've had an informal amnesty for services using their stuff for a long time, Craig has stated that they're OK with services that interface with them as long as they don't use many server resources, but they recently updated their TOU and started sending out huge waves of C&D's a few weeks ago, based on my talking with people.