Well I’ve been on both sides of the fence. I’ve had people donalowd my themes, change a few css styles and then claim it as their own. IMO, that totally sucks. When I realized I wanted to start releasing themes to the public, this is what I did.Since it’s pretty darn near impossible to write every piece of php and css from scratch, I started with the default WordPress theme and began to modify it. I did this because I knew functionally everything was stable.I rewrote how the css appeared in the file, as well as how the php was laid out as well. Then I obliterated the style sheet so that my theme was no longer able to be compared to the original one.Now when I make themes, I will basically take an existing one of mine (which now I feel is totally my work) and then modify it. If you can believe it, the Blue Zinfandel theme is really my Vertigo theme, but heavily modified.