Or a different way to learn some writing skills? At least if you're a terrible writer like me.

But is that still a feature made available only to PG?

They could easily release it for everyone, and they probably will at some point, but right now they're busy working on the version that lives inside companies' firewalls:

http://etherpad.com/ep/about/pricing-eepnet

This is easy enough to do yourself with ttyrec:

http://0xcc.net/ttyrec/index.html.en

Maybe I will write a small web frontend for playing back the recorded sessions. It compresses better than video ;)