Some of you may have noticed that Socrates now has a friend, SearchWorks. SearchWorks is Stanford's alternate online library catalog that has a more user friendly "Google-like" search box interface. In addition to the keyword search, on the left margin it has a set of very useful ways to limit your research - by language, format, publication date, location, call number, etc. There is also an advanced search.
Recently-added improvements allow you to browse by call number across library locations. Now you can go back to the time when SAL3 didn't exist and see all of the books with nearby call numbers, both in Green and in remote locations.
Other features are described in the News column on the SearchWorks search page and on the SearchWorks blog.
I encourage you to try this out - it is constantly under development, and new features are added regularly. If you run into a problem or have a comment, feedback is greatly appreciated, just use the link.