Here are a few links to some NASF related sites.
This is by no means meant to be a comprehensive list,
it's more of an overview of some of my personal favorites.
Players
Mary Youngblood - One of the largest influences on my own playing, she blends comtemporary and traditional NAF styles seamlessly.
Mark Holland (Autumn's Child) - One of the most innovative players I have heard to date, Mark treats the NAF as a true contemporary melody instrument.
Peter Phippen - Billed as a "World flautist", Peter plays the NAF as well as the shakuhachi, bansuri and numerous other world flutes.
Michael Graham Allen - Best known for his work with "Coyote Oldman", Michael is not only an excellent flute player but he is also one of the leading and original flute makers that started the current renaissance of the NA flute. Known for his reproductions of museum NAF's, he is also credited with the revival of the Anasazi/Hopi/Pueblo styles of end blown flutes. His recording "Floating on Evening, Songs from Otter River" is one of my all time favorite NAF CD's.
Timothy JP Gomez - One of the new generation of NAF players, Timothy has a very distinctive style. Offers online lessons as well.
Bryan Akipa - A member of the Sisseton Wahpeton Sioux tribe, Bryan has a very traditional sound and makes flutes as well.
Scott August - Awesome NAF, endblown flute player and Nammy winner from California.
Bill Miller - Native American singer songwriter as well as traditional NAF player.
Jonny Lipford - Very active NAF performer and teacher, lots of online content and virtual lessons.
Ronald Roybal - A great NAF and Flamenco/Classical guitar player based in Santa Fe.
Evren Ozan - Every instrument seems to have a child prodigy, and Evran is most definately the NA flutes.
Hawk Henries - A local NAF player and maker, Hawk is a member of the Nipmuc Nation. I highly recommend checking out his recording "Keeping the Fire".
R. Carlos Nakai - The "King" of the NA flute, Nakai is almost single handedly responsible for the renaissance revival of the instrument.
Makers
Woodland Voices - Colyn Petersen makes some of the best looking and sounding NA flutes in the Woodlands style, and his wife Kitty does some of the best woodburning I've ever seen. Truly awesome instruments and some of my favorites in my collection. Unfortunately, Colyn has now retired from flute making but will occasionally still post one for sale on his website.
Heartsong Flutes - One of the most well known plains style flute makers, JP Gomez makes some beautifully carved flutes that have distinctive, phenominal voices. His flutes are played by the likes of Mary Youngblood and Scott August.
Geoffrey Ellis Flutes - Geoffrey Ellis started out making woodland style NAF's, but now focuses on embrochure flutes like the anasazi and mojave as well as the Xiao and wooden transverse flutes.
Butch Hall Flutes - It seems like you can't pick up a NAF recording these days without hearing a Butch Hall flute, but you won't wonder why after you've played one.
Woodsounds Flutes - Brent Haines makes flutes from exotic woods and burls with a shiny gloss finish, serious eye candy!
Woodland Flutes - Geoffrey Evans makes excellent NAFs, based out of Massachusetts.
Dream Spirit Flutes - Al Solbjor is a fellow member of the "Woodland Flute Circle" and an incredibly talented flute maker and player.
4 Wind Flutes - Brad Young. Another great woodland style flute maker.
David Sanipass - A member of the Mic-mac tribe, David makes unique looking flutes in unusual tunings.
High Spirits - Good flutes at really good prices, Odell Borg's flutes are perfect for the beginner looking for a great sounding cedar flute that won't break the bank. While great beginners flutes, they are also used by professionals such as Bill Miller.
Misc.
The Flute Portal - A large and growing community of Native American flute performers, players and enthusisasts, it has recently branched out to embrace world flutes of all types as well. This site also has an active forum, blogs, music and other great flute resources.
The Oregon Flute Store - Your one stop shopping for all your NAF needs.
World Flute Society - I recommend joining even it it's just for their quarterly newsletter, "Voices of the Wind", a must have for the latest news in the NAF community.
Flutopedia - A great, extensive website devoted to the NAF. Includes history, making of, legends, fingering charts and much more!
Flutetree - Another NAF specific site with an assortment of NAF related material, includes a good selection of songs written out in NAF tablature.