"Who needs textarea any more?" I do. I am writing this comment in VIM using the "I's All Text" extension for Firefox. I use my tool of choice (VIM) for almost everything I write, and I am not overjoyed with "solutions" trying to enforce other tools and behavior than the ones that help me the most. Freedom of choice is, at lest for me, very valuable.

Neat :) Similar to a program I have on my HP-41CX. HyperList is not limited to any number of layers. though. But the VIM plugin is.

HyperList may be an alternative as a straight text solution (even with a VIM plugin doing all kinds of tricks).