I realised the reason why I keep receiving so many e-mails where people ask if they can modify or use my themes or other material is because of the Creative Commons License I selected. Some months after I first released multiple themes to the public I realise that my choice of the Creative Commons License was wrong. I went with the CC BY-NC-ND, which basically means you could distribute my files, but were not allowed to change them (remix), not allowed to use them commercially and had to credit me.
Many people have come up with great modifications of my themes and I really appreciate that.

Now only hours away (I post the first media here today and go public Monday) of a major new release of Rainbow Feather with widget support and several languages I decided to change the license accommodating my work to the Creative Commons License BY-NC-SA, which means you are of course allowed to remix, modify, exchange, distribute, host my themes and material. However two parts of the license remain intact: you need to attribute my work, which I believe is fair since I spent numerous (literally) of hours working on my themes. It is good karma and a nice thing to not remove my attribution; then also, except with written permission, you are not allowed to use my work commercially, which means resell my themes, add your link to add ‘because you are some theme hosting site’ or similar. Again, for specifics, please drop me a line. And now get active, get busy, get remixing!