Yes! There are so many great resources out there. Basically though, a tin whistle is a diatonic instrument, so in it`s most simple form each note is formed by lifting up the finger below it, and then blowing harder for the higher octaves. Also, due to the thin walls of most tin whistles, you can get reasonable tone on the accidental notes by half-holing (raising up the tip of the finger to uncover only half of the hole), although using these in faster music is difficult. A simple fingering chart might look like this:
(1st octave on a D whistle)
x x x x x x D
x x x x x o E
x x x x o o F#
x x x o o o G
x x o o o o A
x o o o o o B
o o o o o o C#
o x x x x x d (2nd octave -- first finger optional)
cross-fingering notes generally sounds just "ok". The tone isn`t so strong. So you can do things like this depending on your instrument (the C natural is the one exception that works on any instrument like this):
o x x o o o C
o x x x o x C
o x o x x x C (this one I can`t remember without my whistle, but I think the last three fingers are optional)
x o x x x x Bb
x x o x o o g# (2nd)
experiment on yours to find more!
Also check out:
http://www.rogermillington.com/siamsa/brosteve/
http://www.chiffandfipple.com/table2.html
have fun..
