obama's online town hall meeting

i am all for this. transparency in government is very important. however, considering that many people in the united states either do not have regular access to the internet and/or do not possess the knowledge to use the technology, this is not a very representative sample of the population. isn't this a democracy? why, then, are we not hearing from all sides? how are they accomodating those affected by the various digital divides? i'd like to hear a story about that.