I'm trying to arrange a meeting with the developer of the WP e-Commerce plugin in Wellington (New Zealand), so if any of you have any constructive complaints/suggestions for the product then let me know and I'll pass them on.

http://www.instinct.co.nz/e-commerce/

I haven't actually used the plugin myself yet, but probably will in the future as it looks quite handy. Fairly straightforward and easy to use.