There have been a fair number of papers published on Google technologies. At conferences, most people I've met have read the paper on which Google was founded, but the ones on GFS and MapReduce are lesser known. If you're interested, most Google research papers are posted here.

I want to highlight one in particular: Rob Pike's recent draft submission "Interpreting the Data: Parallel Analysis with Sawzall," which was submitted to Scientific Programming Journal's Special Issue on Grids and Worldwide Computing is quite interesting. If processing vast amounts of data is your thing, you may want to check it out.