Check this out, Tokyo-based creative agency SET has developed this sexy looking QR code using artwork from Takashi Murakami to promote the work that the two have done together. The code sends you to this site.
I would say this is exactly the type of work that agencies need to be showcasing to brands to get them on board with QR codes. There is a big need for slaping logos and artwork over these things. It often just requires a bit of creative thought. For example check out the rest of the designs from SET for other brands:
[Via Digital Desert]