the old /home/httpd directory was broken because that won't permit /home to be automounted. /var is the right place as explained on FHS2.1 taking that BIND has been using /var/named as a human manipulable data directory, apache should be using /var/httpd (named after the daemon name as in bind) instead of the current /var/www.
The name "httpd" is what Apache uses, and though I haven't tried most of the alternative web servers, it's not guaranteed that they would have the same process name.
i'd started to like /var/www, i guess that it sounds more like /var/ftp and is daemon agnostic :) i've found /var/www used on other systems, so i guess it is the "standar" way to go you win :)
Unfortunately, /var/www is in violation of FHS 2.2 : 5.1, as WWW data is neither logging data, a spool, transient files nor temporary files. " /var contains variable data files. This includes spool directories and files, administrative and logging data, and transient and temporary files. "