You can download the Ubuntu Maverick theme here:
http://dpcdpc11.deviantart.com/art/Maverick-for-Win7-194347855
http://dpcdpc11.deviantart.com/art/Maverick-for-Win7-194347855
The Ubuntu Theme Pack has 3 variations, Caramel, Choco, and Sunny.
You can download the Ubuntu Theme Pack here:
http://desktopthemes.co/ubuntu7-theme-pack-complete
You can find dozens of Ubuntu wallpapers here:http://www.google.com/search?tbm=isch&hl=en&source=hp&biw=1280&bih=860&q=ubuntu+wallpaper&gbv=2&oq=ubuntu+wallpaper&aq=f&aqi=g10&aql=&gs_sm=e&gs_upl=2916l5529l0l5762l16l14l0l7l7l1l204l984l2.4.1l7l0