I love this plugin already and I have used it for less than an hour!
A couple of feature requests:
(1) Would it be possible to have more than one "Product Entry" panel in the post area?
I know we could probably use the "Product Options" to define them, but this might get messy.
(2) Would like to see an option in the admin area to remove all Shipping options entirely (product entry, checkout, etc.)
(3) Would also like to see a "widget" or manual php function of some kind noting the number of items in the cart. Bonus points if this was done in AJAX!
This is probably the only good thing about WP e-Commerce.