I followed the instructions at
http://weblogs.java.net/blog/jfarcand/archive/2008/08/fronting_glassf.html. I cannot get glassfish v3 to work with either mod_jk or mod_proxy_ajp (Linux & Vista), though I was able to get Tomcat 6 to work with both plugins, using the same config.
Please see the following thread for log error messages and background regarding this problem.
Thanks