It has always annoyed me that Wii Sports comes in a crappy cardboard cover. Does anyone want to get together and buy some Wii DVD boxes (available on the Nintendo Online Store)? I’d buy just one for myself, but you save on shipping this way.
Once you have a cool white DVD case in your hand, you can print up a custom cover and stick it in there; here’s a site with some for Wii Sports: The Cover Project
Also note that Link’s Crossbow Training has the same problem (see here: Kotaku: Custom Link’s Crossbow Training Cover)