More to explore:
This baby room (found here) is quite popular in the blogosphere for its untraditionally dark walls, trendy and chic grey crib and bright white accents. A perfect example of how dark grey walls can work.
Modern Baby Room. Love the dark wall color and bright, colorful accents.
Baby room - black wall with bright accents
Baby Room - love the slate gray walls with pops of bright color
I really like the grey walls and bright colors for a kids room!