I did my logo. I took the horse from one of my photos, used the magic wand tool in photoshop to select what I wanted to keep, inversed selection and used the eraser tool to eliminate the background, inversed again and used the bucket tool to turn everything white, adjusted opacity, saved as a png. Did an inverse version as well so it would work in either left or right corner and added text. Viola. I sometimes wonder if I shouldn't do a bird or a tree for non wild horse images, but I'm too lazy for that.