Blogging is interesting as a social phenomenon, connecting people and ideas. It is also interesting for its potential to change and improve the internal and external communication for enterprises, helping to tear down internal departmental silos and opening up the corporate iron gates for the public to see the humans behind them. And it is interesting from a democratic perspective, giving citizens the possibility to connect directly with politicians and to side-step medias monopoly to select, interpret and communicate what they thing that the people want or should hear from and about the politicians.
But from a technology point of view, blogs are anything but interesting. It is much more interesting to discuss what you can do with a blog and how you can get the most out of it. I personally find that Graham Jones and Jeremy Jacobs both share interesting thoughts and tips on their blogs about these things.