The Blogspot site Chess Publishing gives a nice overview of all kind of possibilities to add replayable chess games and chess diagrams to a blogsite and also is the home of the Blogspot Chess Game Viewer.
I think that this site didn’t investigate the possibilities of the DHTML Chess Widget. This widget probably doesn’t meet their requirements, because it needs PHP to be able to run.
The Blogspot Chess Game Viewer is based on PalView and looks like a very nice viewer too. Maybe I’ll have a look at it later to use it on this site.