Dazed's Chiffboard Matrix
I highly recommend that any whistle newbie go to the excellent message board and its archives at ChiffandFipple.com.  Numerous discussions on every conceivable whistle-related topic have been posted there, and chances are any question you may have has already been asked and answered several times over on this board.  That being said, I myself have spent some time in the Chiff and Fipple Archives, and the following are links to specific discussions posted on the Chiff and Fipple message board that you may find helpfulNote:  The information in these links is not my work product, but rather the insightful input of many whistling participants of the Chiff and Fipple messageboard.  The links in this Matrix are direct to the Archives of Chiff and Fipple.com.  This Matrix is merely an attempt to make  it easer for you to find this stuff, and hopefully will lead you to topics that you might not have found otherwise.
Other Instruments
       
Irish Flutes
        Native American Flutes
        Bodhran
        Ocarina
       
Whistles:  Repair and Maintenance
       
Tweaking Whistles (Clarke Originals and Fipple-Switching)
         How to Tweak a Whistle to make it Quieter (or, having pity/mercy on your                                   family/neighbors

Non-Irish Music Themes
        
Church Music for the Whistle
         Wedding Music for the Whistle
         Christmas Carols
         US Civil War

Whistles:  Miscellaneous
        
Photographing Your Whistle
         Travelling with whistles:  airport security

Whistles:  Low Whistles