Promo/Guidance/Branding/Development/Guidelines/CIG/Default UI Artwork

Wallpaper

A default wallpaper should:

be consistent in terms of style with the other desktop artwork.
appear rather neutral in terms of taste. In other words a default wallpaper should be appropriate for both corporate and home use.
use the official color palette.
not be distracting. This means that it shouldn't be too colorful and shades shouldn't change too rapidly. This is especially valid for the upper left area.
be designed with the icons and kicker in mind. Ideally a default wallpaper should show just a single color on the upper 30%, the left 30% of the screen and the kicker area. The reason is that people place their icons in these places and having a single color without any other shapes and picture elements makes it easier to recognize them. Simplicity in these areas is very important.
sizes?
license?

A default splash screen should:

be consistent in terms of style and color palette with the default wallpaper.
appear rather neutral in terms of taste. In other words a default splash screen should be appropriate for both corporate and home use.
use the official color palette.
use icons from the Oxygen icon theme
must NOT use icons that are associated with a particular platform or distribution (e.g. a tux icon).
sizes?
license?
templates needed