The white isn't too bright, but the shadows are too dark, and don't match. I'm a fan of fotofuze, but it can't be obvious. ( I can be guilty of this pretty often) The third photo looks more natural.
This one on the front page, might have been fotofuze.. then again maybe not. It looks pretty natural!
http://www.etsy.com/listing/114443210/4-rustic-wedding-favors-birds-nest-eggs?ref=fp_treasury_10From what I've seen on the front page its more the natural white or shadowed white that is most popular. Like this one:
http://www.etsy.com/listing/103955972/pattern-to-create-teddy-like-hippo?ref=fp_treasury_5If the photos are too dark with out a brighter background, try using an editing program to change the input levels. Experiment a bit. I have to edit all mine, or use external flash to get the right balance.