Home Screen - Helix 2, Beautiful Widget Clock, Pure Music Widget, iBox icon packs
Press one of the icons and you get a menu, these icons can also be configured to open another submenu (Folder Organiser)
Settings screen - AudioManager, JuiceDefender/Plotter, TaskManager, 3G Watchdog, System Info Widget, Extended Controls bar
Twitter (touiteur), football scores (scoreboard)
Empty screen - need to find more stuff to fill it up!
The wallpaper is fractal art http://fc05.deviantart.net/fs39/f/2008/359/e/e/Series_of_Tubes_by_mynameishalo.jpg
. The semi-circle at the bottom makes it perfect, easily shows what screen you are on.
There is a bunch of similar art with wallpaper potential, check the full gallery mynameishalo's Gallery