I've coded a shell script for use on 1stvamp.org, called weblog, in PHP using the PHP teams (fairly) new CLI SAPI.
I can now post shortish posts here using an SSH client and a simple list of arguements:
: ./weblog [-s or -l] [title] \ [post content] [\ optional related link for post]
It has a few very minor bugs which don't stop me from using it (and seem merely to be bugs in the way arguements are passed by bash, but this unavoidable at the moment).
It works at least.