It's working, but man that's super frustrating. Sure wish that you had some sort of app that has offline capabilities. It's so frustrating to think of a thought that you want to get down and find things are just spinning. Or check to see if you have any really important tasks to work on.
After trying just about every GTD type tool that is online / windows based, I'm seriously contemplating moving to Things or Omnifocus. If one of my every day machines was a Mac, I probably would have done it by now. But I do have an iPad and iPhone and I may just decide that working off those is worth it, knowing that I can always reference something when needed.
There's so much to love about GTD next, and I still think there's not a better way to lay down projects and new ideas quickly. But these interruptions are really difficult for good work. (I know it doesn't happen all the time, but when you come to rely on the system so heavily, when it's down, it is seriously painful.)