Here is my Nexus 7 'Hubs UI Layout'
Idea for this has been taken from the iconia A500 thread (can also find tuts and vids on how to do this) here
Basically each screen has a theme, each screen has a folder of wallpapers it cycles through and at the bottom are buttons that take you to the screen with that name.
Screenshots and vids below:
And heres an example of it on my mobile (lantern corps setup)