Text for the site has been written on Amigas, Wintel PCs, BeOS boxen, LINUX machines and Macintoshes over the years, but always using a straight text editor. Graphics have been manipulated on about as many platforms.
General design is simplistic to accomodate Palm based web-browsers. This is one of the reasons there's a general lack of JavaScript, Java, Flash or anything else that requires a highly specced Wintel PC. It's also easier to maintain from a variety of different computers in a number of locations.