UPDATE: I've been searching around Flickr and elsewhere lately, and this image appears to be stolen by others on a regular basis -- so much so that I'm getting comments from people accusing me of stealing my own work! So, please, people, have enough decency to respect my copyright on this picture. I'm not a stickler about the use of my photos, and if you ask me for something, I'll probably be happy to comply, but I expect to be offered a link back if you post this image somewhere. A link makes all the difference to me -- it tells me that you're not trying to pass this photo off as your own, and it sends traffic my way, which makes me happy.
Also, I am flattered that many of you have told me that you are using this as your desktop wallpaper. I have no issues with that. Feel free to continue to do so (and if somebody asks you where you got such a cool image from, maybe you'll send them my way), but if you upload an image of your desktop background for all the world to see, I'd also appreciate a link, just like this fine person did. The background image is mine, and she gave me a credit link. That's all I'm asking for!