Depends on what you mean by a legal framework; as I stated we have an entity and have done a fair bit of legal legwork to the extent that we can plan ahead for the project's growth - but at the moment we are just two people (my co-founder and I) within this legal structure, so take that as you will.
What I meant by "legal" was registered with your local government. It can be a corporation, a partnership, or a project you are running under the table until it takes off. The more organized you are, the more likely you are to attract investors.