Ive never used lightscribe, but long time ago I had a cd writer that would burn images into the unused portion of the data side of the disk.  It too was only greyscale shaded colors, it was extremely hard to see until you got it at the right angle, but then it was a wow because everything had a wierd holographic look and feel to it.  

All in all it was a very pointless feature because who burns a cd that isn't full?  Light scribe is a little more functional...but when i was burning alot of disks i used a casio thermal label printer that would use a print ribbon and print a 3"x2" sized area on the disk that worked real well and was cheap..but was only 1 color per ribbon and didnt shade very well, so it just made very nice looking titles and labels.

by the way...yay 8gb!!