Rich Miller's post on 2006 Data Center stocks made me think. I have played around with a Google Labs tool that is pretty fun, but perhaps not incredibly useful. It is a trending tool that shows you who is searching for what terms in comparison with others (i.e.: Bill Gates vs. Linus Torvalds).
I took 5 of the stocks that Rich mentioned and put it into the trend comparison and here is the result. I think Savvis just has more press releases maybe. Again, this is just what people are searching Google for, and it is only a portion of their searches that are measured.
An equally interesting part of the results is below where it shows the same comparisons by cities. It could be a useful tool for targeted marketing or to see what people are searching for from the big cities.