This comment on my post along with a subsequent string of emails with Dan Milward, one of the developers for WP e-Commerce, alerted me to the fact that they have released a couple of new versions and made several updates to their code since I wrote my original tutorial on WP e-Commerce Gold and Grid View. If you haven’t updated your copy, Dan recommends picking one up here.
Additionally, Dan also drew my attention to their new endeavour: Getshopped.com. Having only taken a cursorly look, Getshopped looks to be a nice integration of WP e-Commerce and WordPress MU. Think of it as a WordPress.com for e-Commerce websites.