I can't remember if we have posted about this site before or not but I got an email from Cindy over at
http://fancyfeather.com who had noticed that folks had asked about feathers before and she wanted me to pass on her information.
Cindy mentioned that she had done quite a bit of work with Sesame Street and Animax in regards to supplying them feathers. She is located up in the suburbs of Chicago but does have an on-line store.
I encouraged her to join the forum so hopefully she'll be along to add her own voice to mine.