Good chance it's just your laser, when you insert a game disk does the small clock on the top right of the screen keep spinning? Sometimes DVD's or CD's will be read fine, just no bluray's.
Dev_bdvd doesn't pop up unless a disk is detected and read, which isn't happening for you so I think it's the laser. Ya can buy a replacement off ebay for like €30 or find a YLOD PS3 and take the BR drive out of that, which should be a better quality laser than buying it alone (they're normally refurbs).
oralphie: Will this allow chuck norris to play backups??? PLZ HELP!!!