When moved into our new house last year my father in law still owned it and insisted we keep all the white walls white. Since every wall in the house was white, I was desperate to find something that would spice up the rooms. I found the Main Street removable wall stickers on ebay. There is a HUGE variety of designs.
The photo is of the butterfly design that I have decorated my home office in and I also found cherry wall stickers from the same brand for my kitchen. While the stickers are removable and won't damage your walls, they aren't resuable, so once they are removed they are pretty much done for.
The wall stickers look great up on the walls, they stick well and do not peel at all in heat or cold. I also tried to decorate my mailbox with some and used a spray laquer coating to try and keep them from coming off, but that didn't work...one snowstorm and they started peeling like crazy, so these are definately for indoor use.
If you need to spice up your walls, cabinets, or even bathroom tiles, these are perfect.