Adage has issued their 2006 Fact Pack which is worth a read.
Some interesting facts :-
35% of marketers will spend to develop in-house blogs
70% of media & communications companies said they were going to include blogs and social networks into their future marketing efforts
RSS is small but gathering momentum, surprisingly 78% of RSS feed users are male
But you’ll have to wait for next years report to get some formal data on Consumer Generated Media, which I predict will continue is enormous growth.
via Media 2.0
