APC ups with vmware, auto shutdown

http://www.techhead.co.uk/how-to-automatically-shut-down-vmware-esxi-gracefully-during-power-failure-using-an-apc-ups

here is where autostart and stop is discussed.  Under the options for the server, Virtual Machine startup / shutdown under configuration tab.

http://deinoscloud.wordpress.com/2010/05/17/vsphere-virtual-machine-startup-and-shutdown-behavior/