I have just updated my ruby-xlib-wrap project. It is a C-wrapper
of the Xlib functions for ruby. It uses the latest version of SWIG 
and includes some enhancements. Please see the ChangeLog for details 
on additions and changes.  The home page for the project can be 
found at: <http://ruby-xlib-wrap.sourceforge.net/>.

Many thanks to Lyle Johnson for his contribution to the Ruby
support in SWIG (especially the documentation)!
-Derek Ney