Also, people that have X amount of idle time don't suddenly give up tv to read amateur political pundits after work.
Of course it's getting better and will continue to get better. In fact, the more I think about it, the more I think that Chris' original post might be a bit ahead of its time. I'm not sure that I fully buy into the class warfare idea right now but I think that it's something that may be brewing if not already building. As internet gets even faster, more omnipresent, cheaper, etc. you will have more and more lower and middle class people spending more time online and having more access to blogs and other grassroots organizing efforts.
Maybe we're seeing the beginning of it, maybe it's still to come, maybe I'm crazy. But considering that the greatest population growth is coming from the Hispanic population, who are trending Dem, are largely NOT Dem fatcats, and whose internet access and usage is in the midst of what appears to be a major boom, I think the shift being described is still coming.
The question, though, is how blogging will change as it becomes democratized and the blog-reader's profile grows increasingly representative of the population at large. My guess is that blogs will retain many of the characteristics they posess today; to put it another way, bloggers I think are more "in touch" than their incomes suggest.
Just thinking of families I know, the main predictor of internet access is whether or not they have a kid who grew of age in the internet era. Income is less important. I was surprised to see that the dailykos readership spans a wide range of ages and centers much higher (30s+) than you would expect; that doesn't square with my personal experience.
