Are there any available themes for moderncv other than classic and casual?
I googled it but no luck.
The themes for moderncv are located in files named moderncvstyle<name>.sty which are loaded by moderncv as sub-packages. In earlier versions they were named moderncvtheme<name>.sty instead, but this got changed (which broke my documents until I figured it out). You must rename existing older custom themes to match the new name in order to be found.
There are only three of these files included with moderncv:
The empty theme is only minimal and doesn't include a real theme. There are no other files on CTAN which this names nor could I find others with a Google search. There is a possibility to create own themes, but no one seems to have posted one online yet.
There is also the empty theme. You can relatively easily create you own theme, though.
If you are not satisfied with the output of moderncv, I suggest using one of these: http://rpi.edu/dept/arc/training/latex/resumes/
moderncvversions the themes files are named differently and you will have to rename your custom theme files to the new naming scheme. I updated my answer in order to reflect this. – Martin Scharrer May 06 '12 at 07:18