I read this entire string of posts (I can't believe it) and after hearing ngppgn's arguments and other one elses, I have to say that I actually agree with everyone because the arguments on both sides were valid.
With that said, ngppgn is asking me to go through the entire game and list every item, difficulty level, location, and which feat is required for everything in a nice charted layout. This would take a lot of time on my end and honestly it's not something I want to do right now. I just began dating this girl and I'm still modding TFN along with my full time job and life responsibilities.
If there ever comes a time where something like this sounds like fun, then yeah I'll do it. People who enjoy discovering these things just need not to read it, but those who enjoy min/maxing would love it! I think ngppgn has a point and so I'd have no problem having this information out for people to see, but honestly right now just isn't a good time to put so much work into charting it all out.
What I can do however is show you how you can chart it out yourself, if you want to take the time to do it. If you do, and it's accurate, I'd be more than happy to display it here permanently. Of course I would need the original .xls files so I can update them appropriately as I make future changes. Without those, I can't update them and would have to take them down as soon as I made a change.
I hope this answer is to your approval, ngppgn.