Hi John,
There is a nice doc in the
xtravirt web that shows you how to simulate an ISCSI storage using Fedora (that is the one i used). It is very easy to install, configure, and attach to the ESX. It is all expained on the doc, here is the _link_:
http://www.xtravirt.com/index.php?option=com_remository&Itemid=75&func=fileinfo&id=16I hope it helps you.
Regards
Andrés Prieto
Barcelona, Spain