Google Books has responded to pressure to provide a way to browse all the available magazine titles. Software Engineer Jeffrey Peng coded a page that lists all the magazine titles, with a Cover View or List View option.
You can also get a full list by going to Advanced Search, clicking the Magazines radio button (don’t put anything in any search box, and leave All Books checked); then hit Google Search. Again, you can switch between List View and Cover View (links in the top right of results page).
Our reference staff had just been talking about the heavy use students in Stanford’s Program in Writing and Rhetoric are making of the magazine archives in Google Books, and how helpful a “browse title” feature would be. Kudos to Google for making this happen and responding to user feedback.
Now if they could only do something similar for Google Scholar, so you could browse a list of all available journal titles … that would be really cool.