To an "old school" record searcher who trudged through snow, rain and heat to read records, Google Document Spreadsheets are a lifesaver. I still trudge to the libraries and family history centers and courthouses and I still xerox , fill notebooks but lately I have moved on to use Google Documents spreadsheets. When I work with myraids of film numbers in Slovakia or Hungary and hundreds of records , the data collected seems easier to handle on these Excel- like spreadsheets online.
My only regret is that I did not do it sooner.