I'm often messing with mod_rewrite to get my site up and running as optimally as possible. It allows you to not only remove those nasty query strings from your URLS, but you can redirect pages and directories, remove the www. from your url, and do a bunch of awesome stuff totally behind the scenes.

This is a fantastic guide to mod_rewrite: http://www.workingwith.me.uk/articles/scripting/mod_rewrite