Can you write a blog post from the command line?
With Posterous CL I just did... Thanks to David Reynolds for putting together this little python script that allows posting to Posterous sites.
I've been wanting some kind of Posterous desktop editor for a while now. There are a few for Tumblr, but nothing for the lesser known micro-blog platform.
Email is probably the most common way to post to Posterous, but here's a fun little Automator script for those on a Mac who want to make life super simple.