http://www.memofon.com/

Create mind maps, progress tracking and todo lists from simple Markdown based text markup.

I understand, it could be considered as a shameless self-promotion, if so - sorry then...

But anyway, the service is free (and it's beta) and i feel it's right place to post about it, so please try it and say what you think :)

Speaking only for myself, I appreciate developers who keep us informed of their applications. Yours is an interesting concept. Good luck with it.

Steve Z.