One observation: Mellel (see www.redlers.com ; the keyboard shortcut from within Mellel is command-option-s) can do the same thing, but also has tons of other features as well.

Considering how much love WriteRoom gets for full-screen editing, I'm surprised Redlers doesn't crow more about this feature.

I haven't upgraded my mac to snow leopard yet. Main reason is I'd like to know - do they have a way of getting a smooth, full-screen console on it yet? On leopard iTerm works. (You used to be able to get a plugin to make normal terminal do it, but this broke in leopard)

I use Megazoomer: http://ianhenderson.org/megazoomer.html