I am currently working full time, as reflected in my 2009 return. However, when I start school, I will not be working and will have an income of $0. I don't think this is uncommon. My 2009 return is a very poor indicator of my financial need during school, so how can I convey this?

This is a common situation. You can request with the school that you use 2010 projections when you file your FAFSA.