As there was no response when I asked if anyone wanted to contribute a banner design, I've gone ahead and done the thing. I hope these are okay! :)

Anyway, three designs to choose from. The first one feature's Josh Kirby's art, and the second and third feature Paul Kidby's. The second and third differ slightly in that the third has a few more characters in there (an extra Death, and extra Rincewind, and also a Moist).