Awesome, I could use some pointers actually alot of pointers lol, Anything you learned I would like to know, thanks!
I think I posted this in your other thread, but there is a forum called chiff and fipple that has a few makers on it, and a yahoo group specifically for wooden flute makers, and they have some whistle players on there as well.
To be brief, there are two types of flutes. Conical bore, which is what most of your Irish (6 holes, single key signature) flutes. These can be cross fingered to get different flats and sharps, and you can make a minimum 4 key (Bb, Eb, F and G# IIRC) to make it chromatic.
Then there are cylindrical bore, which is what most whistles are done in, and modern (Boehm) flutes.
I think if you wanted to try a modern style flute, you can buy the keys and workings and make the body out of wood. There are a few flute makers that do this (Abell comes immediately to mind), and if you can get it perfected, they go upwards of $8000 per flute, some up to the 20k range.
Oh, and check out mcgee flutes page. He has a LOT of research and information on wooden flutes, and I think even a couple of plans/specifications.