This truly allows you to use this code on any sort of web site - commercial, private, non-profit - any. The only thing you need to do is to give due credit. You can do that by:
linking back to my site, either from the page where you use some of the Sparks or from the about or colophon or similar page
retain / add the comment into respective .js or .css file
Rest of the content, like actual posts, photos and graphics, are fully copyrighted by me. If some specific content is published under different license, it will be noted on the page in question.
Why the change from previous BY-SA license? Well, I was regularly waving off the SA part of the license for the ADxMenu (by far the most asked about), thus I wanted to make it easy for everyone.