I just bought an Mini-VGA to S-Video / Composite Adapter for my iBook G4 - I plug it in, attach the cables, turn on the TV, only to see a greyscale Image.
My TV supports 100hz, and I tried every option (Color profile, all resolutions, 50hz and 60hz), still, only greyscale.
Finally, some news... as soon as the new Intel iMac appears, nothing will stop me from ordering one. I can't hold out much longer... Please give them 2,33Ghz as standard, and an updated GPU (X1900, anyone?).