Just wanted to say congrats. I purchased something for the first time yesterday. It's missing a few things, such as search and links to each brand, but overall it's a very nice execution. Examples:

1. Search: I found a few things that I wanted to purchase. Came back later and couldn't find them again.

2. Links: I found myself often (web and iPad) on a product page and wanted to see more by that brand.

Also one thing that has annoyed me, but I understand why you do it. You show sold out items. 99% of the time I don't want to see it.