It seems like a good product, but it doesn't fit my requirements because (1) it doesn't support plugins to specialize its functionality to particular domains and (2) its reliance on the mouse looks like it would make it far too inefficient for the kind of work I would like to do.
It's an interesting project, though, I'll try to check it out and see what I can learn from it.
Workflowy has keyboard shortcuts for pretty much everything. I've been using it for about 6 months now and I swear by it.
Workflowy is an enlighteningly simple app (it's really just bullet lists with zooming) but it's incredibly effective for what it does, and the free-form nature of it makes it easy to just brain-dump random notes to get your thoughts out into text. I use it to do rubber ducking [1], because just the act of putting my problem into text helps me organize my thoughts. I can't say enough good things about it.
It's an interesting project, though, I'll try to check it out and see what I can learn from it.