Copyright and the public domain

Randy Picker has a fascinating post on the Faculty Blog of the University of Chicago’s law school of the copyright status of scans (by Google, for example) of public domain works. Does the effort of digitizing the work qualify as enough original effort to create a new copyright?

What does it mean to be in the public domain? Thoughts about the AP licensing scheme.

The AP has begin trying to license content through a payment scheme. Some of the content — as recently demonstrated by James Grimmelmann “purchasing” a Thomas Jefferson quote — is in the public domain. Does the AP have the right to sell/license this public-domain content? What does it mean to be in the public domain?