Here's my chance to give back to the WordPress community. I have created a new, "earthy" theme. Its got a blue sky, grass, and a wonderful tree! Sandbox Tree, as you can guess, is based on the Sandbox theme.
Licensed as GNU General Public License.
You can find out more and download it from http://www.lagrecaarts.com/sandbox-tree-wordpress-theme/.
Let me know if you find any problems or have any questions.