I've modified acs-lang a bit so that people can choose an option "Autodetect" (locale code: "auto") in the "Change Locale" page. If the locale is set to "Autodetect", lang::system::locale will read the Accept-Language header sent by the browser and search for a matching locale in the ad_locales table.
It is possible to set the system wide locale to "auto", so every visitor is greeted in his own language.
Where can I post a patch? What's prefered, a patch file, or the modified files?