I would argue that blogs are already mainstream. When I was in the USA last I saw bloggers mentioned quite a bit on national TV news, to a lesser extent it happens over here in the UK also. When the talking heads mention something assuming everyone knows what it is, surely then it is mainstream, even if a large part of the population couldn’t tell a blog apart from any other website.
MySpace and FaceBook I would say are mainstream because my Mum has heard of them, and not through me.
What about Twitter?
I believe Twitter is about to go mainstream because I am following a few real celebrities on Twitter who get the medium outside of using it as another feed.
One or two of those names might not be familiar to you but I am thrilled that each one has joined the world of Twitter, and of course each one will bring their own non-internet-geek audiences along sooner or later.
Are there other non internet-famous people you are following who you would recommend? Do you think Twitter will ever/never go mainstream? Please share in the comments … and of course follow me on Twitter too!