I realize I'm late posting to this thread, but want to tell you about a great cloud app that I am loving called GQueues. It hooks in to Gmail through the Google Apps marketplace, has a widget to create tasks (or add to your Project or SomedayMaybe lists if you've set those up) from within Gmail, works excellent from any smartphone using the browser, and has offline capability as well. I'm loving GQueues. There is a video in the help showing how the founder Cameron set up his GQueues for use with the GTD methodology. I've taken a similar approach with mine, as has my assistant (I'm a consultant) and it is really working for us.