If you looking for a site where you can read and post reviews on different cig brands and different loose tobacco brands RYO/MYO smokers use, you can check out cigreviews.
This site is scheduled to have a re-launch. I was told the site will include a shop on the re-launch. I can't say if the shop will include tobacco brands of any kind. But I'm waiting to see this new shop for myself.
The cigreviews site already has a forum with various smokers topics, including one for smokers rights. As you can likely guess from lurking over there, I'm one of the mods for the cigreviews forum.