This tool is very good and will export a LOT of information about your esx hosts, ,configuration, misconfigurations, etc. (and it's free)
http://www.foundstone.com/us/resources/proddesc/vidigger.htmand user manual
http://www.foundstone.com/us/resources/whitepapers/wp_vidigger_user_manual.pdfIt currently only works on ESX 3.x but that should be okay for you--just something to keep in mind.