I think giving an honest evaluation makes it of value to the reader and the blog owner. Gathering other’s honest impressions when money isn’t a factor usually helps improve a site. As I said, Trent’s site is probably quite good as a search engine marketing tool so if that’s the aspect of the site he wants to emphasize he knows he’s on the right track.

Google did take away the ability for non-Google users to leave a comment with their URL for a few weeks. Within the past few days they’ve restored this ability.

I’m not sure about what you said regarding not being able to comment on blogger blogs without accounts. As far as I know, any one can comment on blogger ( if the blog author allows so) … Please correct me if I’m wrong.