Some time ago, someone on IRC said "OmniOutliner is too much for me! I need something lighter." So, I said "Just use Vim!" He said, "That's not enough." So I said, "Look at The Vim Outliner."
This, though I'd never used either beyond a brief putzing around. So, when someone else asked me about TVO when I said it was an alternative to OmniOutliner, I was totally unarmed to supply a comparison. So now I'm gathering info for one. OmniOutliner is way cool, especially because of its Keynote export and its plugins. I still think it may be too much for me, but.. wow!
I also really need to finish the one-third-finished Vim indenting tutorial.