First of all let me congratulate you because your app is awesome. My live has improved a lot since I've changed my GTD application to doit.im.

A very small feature that surprised me to not have it is the context and tags inheritance.

When I create a project, I specify a default context and some default tags. Then, when I add a task into that project, I see that the new task don't have the context and a tags of the project set.

I think that it is the logical way to work but maybe I'm loosing something... What is the context and tags used for now in the projects?