Jaykita, Nanls, Pam, JC, Steve... GREAT work. Such different approaches.
Nanls.. especially like your first of three. It would look good on my bedroom wall! The colors are perfect.
I've been so busy and not enough time to play!! Here's a quick montage.
PS CS2
Used grids to divide the layer. Marquee and put each corner on a new layer.
Desaturated all four layers. Added a color fill layer to each (blue, pink, green and purple. Set to the fill layers to multiply blend mode.
Knocked out the borders, increased the canvas size for the outer border area. Filled with goldish yellow. Pixelize->Pointilize filter added some texture.