Another, sometimes useful whistle forum.

Tin Whistle on Reddit

Came across this website, really useful, lots of mainly old folk tunes.

 

http://folkopedia.efdss.org/wiki/Music

They do seem to have their own kind of humour on C & F, I don't always follow what they are trying to say, it's probably an Irish thing.

Chiff and fipple forums is a great resource and a very extensive and helpful forum. Everyone who penny whistles should belong to it, no matter what type of music they like! 

http://forums.chiffandfipple.com/

The only word of caution I can think of is that they don't seem to have much patience for fun back and forth banter from beginners.  Well then... maybe that's what THIS pennywhistleclub.com social site might be better for!  

I also belong to the Chiff & Fipple forum, it was the first flute/whistle forum that I joined, it is mainly Irish music oriented, but could be worth your while taking a look, if you don't already know about it.