Here is a nice little easter egg built into Joomla! If you add ?tp=1 onto your address string then it will show all the module positions for your template (example: index.php?tp=1) This could be a nice time saver, especially when using third party templates.
I was researching information on how to view module positions in Joomla 3.0, and found your article here. The directions are a bit different in the newer version of Joomla. I just wanted to note that I ended up writing a newer tutorial, just in case you wanted to help your users and simply link to it for the updated instructions.
http://www.inmotionhosting.com/support/edu/joomla-3/extension/viewing-module-positions
Thanks,
– Brad w/ InMotionHosting.com