I know that the new PBG4 17's come with OSX 10.2.4. I am not sure but I think this might include the firmware that enables the Matshita optical drive to burn DVD-R at 2X rather than my 1ghz ti-book's 1x speed.
All of us gig-ti superdirve users are waiting to see if this will open up the drive's ability.
The 8X Cd burn speed is fine for me, very reliable too. The 1x speed on DVD's is well...painfully slow at times.
Updates anyone??