How quickly we forget...
The early issue was with the bulb, a Phillips bulb, not the driver. Sony tried many things before determining the problem was related to the original Phillips bulb. This included changing out and or soldering some boards and giving people the same Phillips bulb.
The solution for the problem sets was an OSRAM bulb. OSRAM = Sylvania. These replacement bulbs did the trick (I have a spare in my closet). Later build sets now use a different Phillips bulb than the original. Different model number, etc. My 60" is used heavily (12+ hours per day), is a Dec 03 build and I am still using the original Phillips bulb. Read the manual, somewhere in there it states bulb life.
Long story short, if you have an August build (or even April 2004 or later), you are good to go. I bet you got a killer deal on the set too, my neighbor picked up a 50" GWIII for almost 33% under MSRP.