Oh wow. Although I haven't studied most of the words, I'm freakishly obsessive regardless, and I once took John O'Laughlin's list of words by playability then split it up by word length in Excel, then found a macro to sort them in alphagram order, and separate the words of various lengths into individual spreadsheets. This took many hours. Basically I did exactly what Zyzzyva is programmed to do largely by hand (although I did eventually assemble a macro to count the number of letters in a word), because I'm too horrific a programmer to be able to code it myself. I guess I should see if somebody has done my dirty work for me before I spend hours sorting through a list in Excel, time that could be spent actually memorizing the words. I don't think I knew of Zyzzyva at the time, however.