As you can see in the right column, I've started listing some sites that were recommended by various Etsians when I started a thread in the forums. I'll be adding to that list as time goes on and will archive any that I delete due to space restrictions.
If you have a site to recommend for crafters to list and/or sell their items, please send me a link along with your 'review' of the site. Don't forget to include your Etsy Shop URL (or your website) so I can make sure to have the link in there to you.
Here's the direct link to my website where I have ALL of them listed. Selling Sites.