http://buzz.blogger.com/2010/08/new-comments-system-on-blogger.html

http://2.bp.blogspot.com/_pEySW06zZgc/TGInfi0_thI/AAAAAAAAAIg/-ImYPx2w3-A/s1600/published.png

"...we’ve integrated Google’s spam filtering technologies into the Blogger comment system. (...) We also created a place where you can see all the comments that have been published on your blog. The Comments | Published sub-tab provides a similar view as your email inbox. This view comes in handy when you want to see all of the comments on your blog in one place..."

   These features are pretty useful. For me, a way for author to comment on comments and the ability to reply to comment(s) without leaving control panel would be enough.