I'm working in Rachel's 15+ journal, purple owl tree, and while I haven't finished the spread because I'm waiting for the texture gel to dry, I have been playing with the photos I took along the way... I don't want to spoil the suprise for Rachel until it's finished, so here's a taster instead...
Here's a mosaic version, courtesy of CS5... I might have to do this in glass... or painted eggshells work well too, especially for irregular shapes like these.