Just wanted to announce that I recently started my own textures site.
Since I did a lot of things related to game-design, especially textures now, I thought there is enough content to start a site with and everything will be public domain. I do this because I was annoyed that there was not enough open source compatible content to work with and it took me a long time to get started with all this and so I thought I will share it in hope to save others some time to do it themselves. My goal was to make a public domain version of those commercial texture-sites, so people who don't like copyright will also have a place to go.
My site is for multiple projects, but the textures can be found at: http://www.duion.com/art/main
Click the categories on the left for the pictures, there is no fancy teaser-page yet.
The photos are mostly my work so far, but I also migrated over a bunch of textures that seemed good enough from Titus from burningwell, he told me I could do that since he was looking for a new platform because of traffic issues with burningwell.
If you also want to share your photos, contact me, but you should have some experience, since I want to keep a fairly high quality throughout the site, to ensure that the content is useful to others. There is no different licenses, since I want to keep it CC0 straight, to make things as easy as possible for the user, so you have to agree with that, if you want to share you work also.
Feedback and requests is welcome.