"Sony and Toppan Printing have developed DVDs consisting of 51 percent paper. Data is stored on the discs using a blue laser instead of red. The smaller wavelength of blue laser light means that 25 gigabytes of data can be packed onto each paper/polymer disk, more than twice the capacity of traditional polycarbonate plastic-based DVDs."

http://www.newscientist.com/news/news.jsp?id=ns99994894

yee haw!  Now we all get to buy 'blue' laser DBd players!