I have created, I guess you would call it a mod, for those who play Caylus online on BSW.
Essentially, it's new art. The cubes are more interesting. Stone, wood, and cloth all have appropriate textures, and food is nicely marbled.
There were also a couple of minor changes. The lines between the sections on the royal favor track were strengthed a bit, so you can more clearly see that you cannot go past certain areas until those sections are scroed.
Also, I changed the color of the black houses for the tiles to make them look more like the colors of the workers and houses at the castle. A minor change, but it makes me happy.
You can see a preview here: http://www.boardgamegeek.com/image/153965
You can download the mod here: http://www.boardgamegeek.com/fileinfo.php?fileid=19646
Unzip it and copy it to your BSW/caylusPics/3 folder, wherever you have installed the BSW client.