Has and belongs to many ... howto in the view?

I have a project, it has members. I have the data modeled, the
ActiveRecord setup but I’m running into a block as how to accomplish
this in a view. I would like if when the Project is being edited to
present a list of all users, and then have a checkbox beside each
name. Those selected would be a member, those who are not, obviously
would not be. I am, however, not closed to other ideas.

Basically, I’m just not sure how to implement the view. Is there a
Howto, tutorial or something in regards to this?

Thanks,

Jeremy