I'm sorry, but the lack of Web/Desktop app, compounded with the
tagging bug I found earlier, and the fact I'm putting my career on the
line by going to GTD, and need to get it rolling smoothly, I'm going
to have to give up on AC. I'm going to use RTM as my GTD manager.
It's not custom built for the task, but it is flexible and
customizable enough to make it work, and it's ubiquitous enough that I
can utilize it in almost any context.