Apparently they are looking in to extending the application to transmitting news, weather, and music. I was also quite surprised to hear that in Germany there has been a positive reaction to this! Methinks us aussie commuters will find it too invasive - being more reserved types, I know I would. There is nothing nicer than resting one's head and feeling the rumble and rocking, back and forth and the meditative trance this engenders when travelling on PT.
Now this website is all about green messages - so it occurred to me that you could use the technology to prime people for good purposes - such as, did you put that piece of litter in the recycling bin, or did you pump extra air in to your tyres this month?
There are no end of good applications but I still think that there will be an outcry! Communication and information boundaries need to be enforced at some point.