g-metricsI've always thought it'd be great, and ultimately very important, to have some kind of time axis in search - to be able to search not only the web as it is now, but as it was at some point in the past. The Internet Archive is a start toward that goal. Today I learned about "G-Metrics" - a Google hack which allows you to track the results for queries over time. Another small step...

(thanks, ResearchBuzz)