I made a quick and rough little application to calculate the amount of time it takes to run a Swiss system tournament. jQuery -ui sliders make it easy to run different scenarios. All the logic and important style is in the source. I’m too lazy to make it work directly in WordPress, so it has it’s own home, http://www.mplsbikepolo.com/swisscalc/. Maybe I’ll make it better someday, but probably not.