I've just spotted some research by Emarketer on US blog readership which shows that, despite the justified excitement and uptake of Twitter et al, blog readership is set to grow from 94.1 million readers in 2007 to 145.3 million in 2012. That figure is people reading a blog at least once a month.
Whether or not that's totally correct, what's interesting for me is that the 94.1million in 2007 is 50% of U.S. internet users. So 50% of internet users in 2007 didn't read a blog once a month in that year. Is this because they didn't know about them? Didn't care about them? Didn't trust them? Need them?
Definitely shows there's still room for growth in the blog world, with blog advertising predicted to more than double by 2012.
Get more details, and the option to obtain the full report from eMarketer.