There's a debate going on at present about whether bloggers are "citizen journalists" and whether their opinions count. Provocative piece in the Telegraph here: http://www.telegraph.co.uk/culture/tvandradio/9795521/Critics-are-important-even-in-the-blogosphere.html
and a debate live on Radio 3 this morning about the future of music criticism, led by Tom Service: http://www.bbc.co.uk/programmes/b03yq7dz
Someone has to say this: there are quite a number of us who are professional writers first, bloggers by coincidence and/or in addition. I'm not "a blogger". I'm a writer who has a blog (and had a musical training). Just so you know. Cheers, all.