mod_proxy_balancer

Just yesterday I was bitching about how bad mod_proxy was, but one of my biggest complaints is being addressed in the upcoming Apache 2.2:

http://httpd.apache.org/docs/2.1/mod/mod_proxy_balancer.html

Still looks like it's lacking, but at least it's becoming a load balancer now, without having to use mod_rewrite and an external rewrite program.