According to DigiTimes, the shortage of Blu-ray Disc pick-up heads is expected to ease in 2007. This is due Sharp entering the blue laser diode market and increased production numbers from Nichia and Sony.
As Nichia and Sony will increase production of blue laser diodes used in Blu-ray Disc (BD) drives and Sharp recently joining such production, the current global shortage of BD pick-up heads (PUHs), in which blue laser diodes is a key component, will gradually relax next year, according to sources in Taiwan's optical disc drive industry.

Nichia and Sony are currently the world's top two producers of blue laser diodes, but Nichia is suffering from a defect rate too high to meet global demand and Sony's output is going mainly for use in its PlayStation 3 (PS3) and BD burners, the sources indicated.
This is definitely good news, especially for those looking to buy a PS3. If you'd like to read more, the entire article can be found here.