Android :: Highly Organized To-Do List Application

I am a freelance graphic designer, and I just bought the Droid for Verizon as a tool to help organize jobs and business.

I'm looking for an application to help organize my jobs, and I think the features and abilities I'm looking for in ONE program may be too advanced, but we'll see.

I want to find a sort of To-Do list application that will let me do all of the following:

Organize Jobs by Clients and allow me to select the job, read the general description of the job. I want to be able to have an appendix to each note that will allow me to view people, businesses and contacts that will be involved in the job aside from the main client, ie Print shops, mailing houses, owners of rights to imagery, etc. I also want to be able to directly contact any of them as a link through the list note. and I'd also like to be able to have another annex section to each note that will allow me to set up a to-do list for each project, example: Illustration job list would be: Finish pencils Finish Inks Finish Colors Scan etc.

Anything out there for something like that? Understandably there probably isnt a program out there specifically for graphics jobs organization, but I am wondering if there is a to do list or general list application that has that intricate of an organizational structure.