I've decided to license all my photos published here on deviantART under a Creative Commons Attribution-Share Alike 2.5 License
. There's more information if you follow that link, but in short it says that you are free to share, copy, use and manipulate my photos under the condition that you attribute me (just link to snader.deviantart.com) and that you license your derivative work under the same license (don't forget this). Commercial use (selling prints of derivative works for example) is also allowed.
Of course it's still nice to know if you use a photo of mine so please let me know if you do use anything.
I know I've said no to requests to use/manip my photos earlier for reasons I no longer agree with (or understand for that matter). If I have said no to you before, and you happen to be reading this, consider this a late yes.