Unfortunately the world of Photoblogging is down to a lot of M&M's (Mutual Masturbation).
I started photoblogging 2 years ago in the hope that I'd get comments that would help me improve my technique.
For 4 months I got no comments, then I realized that with a bit of M&M I'd get comments back. A few of the sites I visit there photography is rubbish but they get lots more comments than I do simply because they comment on lots of other sites. Don't let the comment numbers game fool you into believing these sites are great photographers, they just have better networking skills. Some of the best work out there gets very few comments.
It dosen't take long before it all becomes a real pain in the arse, now I comment on a few friends sites and photoblog for my own pleasure.