While it may be expensive to try and get a hold of a Blue laser drive or player, this did not stop The Led Museum's reviewer from getting hold of a Sony Blu-ray laser diode (for a Sony PlayStation 3) and modifying an AAA LED flashlight to use it as a violet laser pointer!
Going by the article, this Blu-ray laser module outputs 5mW to 7mW of laser radiation with a violet wavelengh of 404 to 407nm, which for a laser pointer would be very unusual, not to mention make it stand out from the red, blue, green and yellow laser pointers more readily available.
Quote from the article:
As I stated earlier, it uses a Sony Blu-Ray laser diode that is reported to output 5mW to 7mW of laser radiation at 404-407nm (nominally 405nm) in the violet part of the spectrum. Because it is at the violet end of the spectrum, it will not be as visible mW-per-mW as blue, green, or yellow laser pointers, but the color is absolutely gorgeous, and is very radiant and unusual for a handheld laser. The laser diode was cannibalised from a Sony Play Station 3 optics sled assembly that I purchased on Ebay for $88.03 on 03-22-07 and that I received on 03-31-07.
The article, including photos and the outcome can be read on the Led Museum's review page here.
Then again, should there be a winning format where the unsuccessful format turn out to be totally obsolete over the following year or two, I'm sure there will be a few interested interested in what can be done with the laser diode.