Thank you for this. I see this as a perfect companion to Freemind. Sometimes I want to jot stuff down, and firing up freemind is too cumbersome, or I'm on my laptop and haven't sync'd recently. I've been using Evernote for this purpose, and it's just not quite as graceful as a mindmap.

For getting ideas out quickly, and sharing mindmaps without installing software or paying for an one of the (many) web-based services, this looks pretty ideal.

Also, +1 for folding.