Comparing bibliographic databases

We have begun to compare search results and search options in 4 online bibliographic databases:

Amazon.com
boooks.google.com
Librarything.com
Worldcat.org

As a first step towards systematically comparing these databases, I would like us to compile a list of sample searches to do in each database. Members of this task force can enter names, titles, and keywords they would like us to try in our wiki. If others on this list have ideas or suggestions feel free to add them as comments to this post.