g-client from EmacSpeak
Getting it to post to a blog is slightly tricky. You have to first know the special URL for posting via Atom API. This interface could be easier. Instructions are here: http://splash-of-open-sauce.blogspot.com/2009/08/how-to-use-g-client-from-emacs-for.html
http://bc.tech.coop/blog/070306.html - Bill Clementson mentions g-client in passing (as method of accessing google-calendar), and touches on his installation method.
Does this still work? Coming to it new, I can’t view or add calendar events (which is all I want to do, so I haven’t tried anything else).