This is sorely missed from the Storm. I liked looking at the display (when I had the 8830) to see what upcoming appointments I have. Are there themes out there like this for the Storm?
As of right now, there are NO other themes for the Storm besides the one that comes standard. AFAIK, the app used for making themes has not been updated to support the Storm yet, so all themes would be in the planning stage at best.
This is part of what it means to be an early adopter, so get used to it.