I use the todo.txt cli and it is awesome.

    t add "complete the pricing mocks"
    t 1 pri A
    t do 1

Nice and simple, and I can always open it up in a text editor if I need to. I might write something similar at some point though that would work with csv instead of txt. It would be a bit easier to use with a text editor (since there is no special syntax other than the csv standard), and could be passed around to excel users.