I love the white-washed logs against the white mantle. Alternatively, you could spray all the logs different colors, for a more playful approach. I have a rad fireplace cover that I wouldn't trade, but I'm sorta wishing I could implement this!
DIY stacked wood fireplace facade -- I actually really love this idea even if you don't have a fireplace to begin with. It'd be so simple to zazz-up a brick or stone wall with a faux fireplace to create a gorgeous feature wall.