Beside the shortcuts to do common actions (found on Nokia phones for example) I lack profiles…

I lack a low battery use profile (with low Luminosity, no wifi, no 3g), a 3G profile (I always have it off to spare battery).

Profiles could be reached by a swipe down or up gesture and should be configurable. Perhaps a + button (add to profile) could be added in each of the preference panel, so you could have in the profile only the things you need (example: 3G on/off, wifi on/off, Luminosity)…