PLEASE NOTE: Native Lighttpd Windows builds are available at http://en.wlmp-project.net/
The last available Lighttpd for Windows build that I created using Cygwin was Lighttpd for Windows 1.4.17. Updated September 29, 2009.
Due to an inquiry on the lighttpd forum, I am documenting it here too, that my latest lighttpd RPMs and source RPMs are available here:
As of this writing, 1.4.12 and 1.4.13 RPMs are available at the above locations.