Better clear a shelf in your basement for that high-end Blu-ray DVD player you just bought. Researchers report that they can boost the amount of data stored on a disc 10,000-fold by using gold nanoparticles. If commercialized, the technology could allow a single disc to hold as many as 300 movies or 250,000 songs…The approach could allow discmakers to store up to 1.6 terabytes of data on a single disc.

Compact Discs Enter the Fifth Dimension –  ScienceNOW

Except gold is expensive and writing and reading data is ever so slow…