In reply to Jeremy.

Thanks Jeremy. Yep, since the products are really posts the parent is the blog.

You probably have to try one of the other conditional tags. I'm not sure which as I'm not familiar enough with WP Ecommerce. I would think they've set up something consistent with all their product pages so the system knows it's a product page and not a regular post.

If you check some of the examples on the conditional tags page there are also some examples about finding all children of a single parent. You might have to modify one of those examples.