Just a little plugin that lets you launch emacs (or vim, or whatever) for any text area in Firefox. This means familiar keys, spell checking, and everything else I already use for code, email, etc - just about everything that isn't an image. Using emacs just makes everything easier and it means the browser isn't a choke point - I've lost half finished articles before in a bad click or browser crash (updating debian takes out the browser half the time) before.
[ten minutes later...] It isn't perfect, it doesn't work with the Firefox > 1.0, but does work with mozilla. The default temp directory is /tmp/ which means half-finished items would get killed on a reboot (it only happens a few times a year, but still..). Otherwise spanky.