This list could be much bigger than it is now,given the increasing number of retailers which are beginning to accept BTC as a means of payment.I'll write some of them now,but with time I will probably also remember some others.
I'll do my best to keep the list updated and follow the news, I was planning to make a list as personal reference, but then thought of sharing it with the community.
Thank you for sharing these good sites. It's a great topic and very informative, I hope that you can add more and make some updates every period. I know a few of these sites, and I enjoyed seeing in which way can I use my bitcoin for the sites that I don't know. Keep updating this topic, and I am sure that you can be awarded by a lot of merit points as the idea is very good.