Kinja is Gawker Media’s blogging platform, and I really like the graphic style, interface and discussions. I do have a few problems with it, though:
(1) It does not automatically output quotation marks (’, ” &c.) when I write ' and ". This is quite annoying, since I have to copy-paste every quotation mark.
(2) It display all of my comments along with my written articles on my personal blog, which leads to unavoidable clutter, and you can’t turn it off.
(3) I kind of wish it would allow you to change some of the design, but I understand their decisision not to allow it.
I may end up creating my own blogging platform in PHP (or Perl!) or something and borrow some graphical elements and design decisions, and I may even release it to the public, if that’s something of interest.