It's always interesting to review the collection of Cease and Desist Notices sent to Google (and others) via the Chilling Effects Clearinghouse. Today, a few new C&D letters were made available including several from Microsoft that request Google...
Google provides DMCA takedown requests that they receive to the Chilling Effects Clearinghouse. However, you can get some sense by searching for Yahoo at Chilling Effects. What's spam? Search columnist Kevin Ryan wasn't quite correct in saying...
Chilling Effects Clearinghouse http://www.chillingeffects.org/index.cgi Chilling Effects aims to help you understand the protections that the First Amendment and intellectual property laws give to your online activities.