In the next few days I will begin rolling out themes for the Pro version of the Signal Strength Widget. To start with I will be creating different colored skins. As I get more time I will be developing true themes that have a....theme (sports, movies, music, etc). Please leave any theme ideas in the comments or email them to me.
Update (9/1): Themes are getting close, the settings are setup, I just need to work on updating the UI once the theme is changed.