Yes - I am finally replying to this post, I have no time to look at my computer today...
AVOD is indeed being introduced on some flights. If you are flying the 744 from LHR, chances of getting AVOD in F and C is very high. 10.4' PTV in Business class is one of the largest you can find. There is library of music CDs to choose from as well. You can choose to listen to any tracks on the albums featured. The ones you find in Y Class are the standard ones, nothing to rave about.
Their selection is normally quite up to date so enjoy your flight!
Read my trip reports about this airline! Although my first few reports were posted by SQ772 so you might want to search for his name as well...
SQ 772 - happy?