I'm building a collection of clip art resources in this section.
Here's some free flower clip art:
This flower picture might be good for a MySpace layout background:

I found some old clip art that I made with Inkscape after a bad experience where Windows would give me the Blue Screen of Death every time I shut my laptop down.
The Windows Blue Screen of Death clip art is below. I am releasing these masterworks into the public domain, so feel free to post them on your Web sites. A link back to this page would be appreciated, but is not necessary.
Another nice set of mini icons can be found on sweetie.sublink.ca. It looks like there are over 170 mini-icons included, and they are licensed under the Creative Commons Attribution-ShareAlike 2.0 license.
Here are a few:

Some free butterfly clip art. You can get the original SVG images at Open Clip Art.
Inkscape is a great free vector graphics program for Windows, Linux and Mac OS X.
Vector graphics are images that are defined by mathmatical equations instead of by pixels. That means that you can change the size of the graphics without losing any image quality.
SVG or scalable vector graphics is an XML markup language for making vector graphics. Inkscape creates all of the XML for you, so you can just draw on a screen (something like using the Adobe Illustrator program).
There is some great frog clip art over at OpenClipArt.org.
Here are a few of them from Open Clip Art:
For some reason, this site has been getting ongoing traffic from people searching for "free scooby doo clip art" (and sometimes Scoobie Doo).
I like to keep my readers happy, so here is where you can find your free Scooby Doo clip art: