It has been awhile since I saw a theme developed that worked for the 7100 series so I had to mention this. The guys at ThemeBerry let me know about a nice and clean theme they released recently. The icons are nice and clean with very vibrant colors. The top bar is also slick with a nice big clock but I wish the date were a little bigger. The text highlights for the theme are green which fits nicely with the overall look.
Each version of the theme is available on ThemeBerry for $7 each. The theme comes in icon, today, zen, bottom zen, and L styles. The bottom zen and L styles require OS 4.5 and sadly are not customizable.