I'm in love. I've just discovered the Nursery Designer website by Carousel Designs, and it's amazing and so fun to play with.
They have tons of fabrics to chose from, and you just drag and drop them onto the part of the bedding you want in that fabric. They'll even show you just the matching fabrics if you want. And you can change the wall color (Benjamin Moore paints—real colors!) and trim colors, change the flooring (so it looks like your room), change the crib color, and so forth. And then you can have them make the bedding for you! What a magical place.