Am I the only one that would like to have the board be much larger? Even the 19x19 board is smaller than a typical chess board, and I've got a ton of room for it to grow.
My solution works simply by setting the image height and width to 25; to use it you need FirefoxandGreaseMonkey; you'll also need the Greasemonkey script and possibly to change the value to something you're confortable with (instead of the 25).