For a great website showing the necessary woodwind requirements for Broadway Shows check out:
 http://shows.bretpimentel.com

Nice resources for Woodwind players :
http://www.bluffton.edu/~schatta/WoodwindDoublingResourceProject/index.html

Ed Joffe is a 1st call studio woodwind player (was a classmate of mine) and a real authority on the subject of woodwind pedagogy.His site is very informative and entertaining:
http://www.joffewoodwinds.com

The American Society of Music Arrangers and Composers:
https://www.asmac.org/index.php