If the silicone iPod nano cases didn't completely fill your need for fake rubbery goodness, iShoppo also has the Uniea MacBook keyboard protectors. These protectors also come in a variety of colors and sizes to protect the MacBook and MacBook Pro keyboards. They are available in a few different colors that definitely won't match the rest of your laptop (except the clear one). $20.
Product Page [iShoppo]