http://www.yamaha.co.jp/english/product/computer/extra/products/crwf1/crwf1.html
Sounds kind of cool actually...
"...Laser Labeling System, which allows graphics and text to be burnt onto
CD-R disc, eliminating the need for labels. Customers can put graphics,
such as signatures, logos, memorandums, and photo images onto CD-R's
unused area after data writing."