This is too big to just post in the Clips and Snips board. Several C&Fers have sent sound files to Teri Kessler, who mixed them for a digital session, of sorts. You can hear the results on the Clips site. (Go to the News Page for details on the performers.)
This is a new evolution (or at least an expansion on Dave Auty’s and Mick Woodruff’s concept) of the digital whistle community in which everyone is invited to participate. (If you can figure out what I’m saying.) So hear what we did and get ready to join in. 
http://www.nwparalegal.com/music/hob.mp3
Tony