If anyone is interested in a few fun shapes, I put up some UIBezierPaths at github. These are courtesy of PaintCode, through SVG import. I discovered that I could build a shape in Photoshop, export it to Illustrator, and save to SVG.
None of the art is mine, and the shapes seem to be freely licensed. The cute stuff is by ~hikaridrops on Deviant Art.
In related news, this UIBezierPath is not a dogcow:
but this is:
For details, see Macintosh Technical Note #31.