The red theme is nice. But I hope to hack the GUI so I can have something quite a bit different :-) Brightness - fairly low preferable as that saves battery I bet. For background, Su-35, black helicopters, Ayanami Rei and Vampire Miyu are nice. And I only left the clock on the desktop.
Hedgecore: FYI, the wallpaper is combined with the title bar for your current theme and saved in /home/user, so it doesn't matter if the original image was on the MMC.
There's a limit to the number of panel applets that'll display. If you've got the Bluetooh plugin and the load applet, there'll be no more room for the clock.