Dewayne,
The beauty of the system I use is that MindManager and Outlook 2007 play very nicely together. You can create and edit Outlook items (tasks, appointments, etc.) inside of MindManager and changes are synced between programs. You can also export items from Outlook to MindManager as well.
For the front end of my system, I use custom views in Outlook per "Total Workday Control" by Michael Linenberger. He shows you how to configure Outlook so that the To-Do bar (was called Taskpad in Outlook 2003) only shows what you’ve marked due today. This serves as my next action list. When I finish something and mark it complete in Outlook, it disappears from the To-Do bar and gets marked complete in MindManager as well. When I exhaust the list, I can flip over to MindManager and change the due dates on queued tasks to refill my list. Anything left undone is automatically carried forward to the next day and flagged in red (gasp!).
Please note that I don’t use contexts for my system, but to implement them, it would be as easy as creating custom categories for the contexts and sorting the To-Do bar by category as well as the other criteria which Linenberger demonstrates.
MindManager is a great tool. Not only have I integrated it into my GTD system, but I use it for brainstorming and quickly working out a visual representation of just about anything. It’s an expensive solution (at least in my opinion), and is only as useful as the amount of time and effort you are willing to invest in learning (which the program is pretty simple to pick up and use) and using it.
BTW, I use a tablet PC, so my system is pretty much with me everywhere. If you’re mobile and can’t (or don’t) carry a laptop with you, this system might be a little hard to maintain.
Wes