As a Workflow Coach, I'm always working with clients on a thin line between supporting more detailed "techie" kinds of conversations and questions, and maintaining the focus on the simple but powerful concepts that don't require that kind of granularity to implement successfully.
There are already several postings about discrete software add-on's to the Palm, Outlook, etc. which is fine for the folks who are already deep into those tools, but which might be irrelevant to many of you. In fact, from our experience with lots of people, you can very easily get much too wrapped up in trying to make every detail fit and connect in all the ways you'd like it to. Systems must work when you have the flu, which means easy, simple, straightforward, without having to think too much or work too hard about fitting within a structure. Plain flat lists, tied together in a Weekly Review to keep them current, usually wins the day.
This is a definate "form follows function" system. As you process your in-basket, the next actions you decide will mandate what lists you set up, and how you access those lists.