A while back the topic came up either in the IRC or on the list about wanting to run an X11 app on a Linux server, and view it on a windows machine. Someone suggested Cygwin, but I just came ac across something else that might do the trick. From their site:

Xming X Server for Windows

Xming is the leading free unlimited X Window server for Microsoft Windows (XP/2003/Vista). Xming is fully featured, small and fast, simple to install and because it is standalone native Microsoft Windows, easily transported

portable as a Pocket PC X server. It is totally secure when used with

SSH and optionally includes a special PuTTY SSH client and a portable PuTTY replacement.

Xming is built for Microsoft Windows (32-bit x86) from X.Org source code kept current and secure with updates for X11R7.3, XKB, FreeType2 and Freedesktop Bugzilla. My patches are applied and the code cross-compiled with MinGW and Pthreads-Win32.

Ongoing Xming development is essential because its predecessor projects, Freedesktop Xming and Cygwin/X, have lapsed.

Xming is mostly a derivative work and has many licenses e.g. the zlib license, LGPLv2 for Pthreads, MIT/X11 for all PuTTY tools and the pixman library. The Xming server is licensed GNU GPLv2, but repackaging and/or redistributing any part (or whole) of the Xming website, documentation, images, executables or installers, by the internet, other projects/products or via media such as CD's, without asking permission, clearly acknowledging the contribution of 'Colin Harrison' and providing links to StraightRunning.com/XmingNotes/ and SourceForge Project Xming will be regarded as a breach of copyright.