broadcasting, sowing and not worrying about harvest

In one of the conversations at the conference, we were reflecting on the different forms of communication used today - especially on blogging, facebook and twitter. Reflecting led us to recognise what it probably already pretty obvious to most cultural observers, that much of this is less communicating as we have been accustomed to think about it, and more to do with "broadcasting" - that is, people put whatever it is that they want to say out there, and don't worry too much about responses. It is not about one to one or one to small group conversation, with interaction. It is about saying your stuff, and letting the rest of the world deal with it as they wish.
For those of us of a certain generation, it feels odd. There is clearly the danger that it gets entirely self-centred; if nobody reacts, and I look for no reaction, then there is no challenge to what I say, how I see the world, and in effect I am all that there is.
But - thinking about this has drawn me back to the parable of the sower. The one where Jesus says the man goes out to sow and broadcasts the seed. That is actually the word used. Some falls on stony ground, some on thorny ground, some of thin soil and some on rich soil, and bears a harvest that is overwhelming.
In what ways might some of the new forms of communication link us to this picture of gossiping gospel, of living out the Kingdom; broadcasting without worrying too much about what the result is.
Not sure about this - but, if there is anybody out there, I'm old-fashioned enough to want to know what others think.....