Until the CEBIT 2001 exhibition you can buy HOBLink X11 for 80 DEM (+ taxes) for ptivate use. If you need an easy to use X11 server to run e.g. GIMP as a window-application on the WPS it is a good choice.
URL: http://www.hob.de/news/news3100.htm
Source: OS/2 ORG