I thought that Morihei Ueshiba was really pretty clear in "Take Musu Aiki", that's what he spends most of the book discussing...
Chris, how many people that you know and train with approach aikido in a similar fashion to that laid out in Take Musu Aiki? I don't know any. None. Perhaps, as others have said, no one is actually doing aikido anymore? Perhaps I haven't read the book in question, I'm familiar with a series of lectures complied into "Takemusu Aiki" on Aikidojournal.com, is that what you're referring to or is it something else that isn't in my library?
Perhaps you'd like to answer your own questions and explain how aikido can be applied and learned totally removed from the physical practice of aikido?