1024 by 768 or above.
Do not use any text beyond your name in the corner and any sites you plan on uploading it to (also credit me for the original vector if you do!)
Image is below, or go here: http://www.yinyanganime.com/intgfx/Anatasia-2.png
Details: If you choose to do this, and you need a higher resolution to work with, or changes in colors, let me know and I'll send you it.
I worked really hard on this vector, and I would like it immortalized in a wallpaper I can use and be happy to look at every day, but I am swamped with other work and would appreciate it if someone made something nice out of this.
I am not particular about any of the design elements, go with what you think will work best for this. It is a vector... so.... maybe some sort of vector elements? Its really up to you.
If you need some inspiration, or want to know what wallpapers I like, go here: http://serated.minitokyo.net/favorites
Those wallpapers are really cool, but AGAIN, design is totally up to you.