I finally want to dip my hands the fluids on Animation Master.
Is there a "definitive" tutorial for them? I did some seaching with no luck

A search for 'fluid' will return more results than 'fluids'.

I don't know about any particularly "definitive" tutorials but there have been some pretty nice results posted here in the forum.
There was an early group of tests that I haven't found yet (released shortly after the introduction of fluids) that features fluids turning water wheels and cascading down ramps. I believe Stian was the one that posted the intitial test that caught my attention.

I see that example by Stian is here along with posts by the usual suspects:
http://www.hash.com/forums/index.php?showtopic=2917

Here are some examples of fluid in use (including a suggestion that often people want water effects more than they need fluid):
http://www.hash.com/forums/index.php?showtopic=35872


Here's a search on the word 'fluid' that turns up just about all the discussions of fluid here in the forum.

Thanks Rodney, I try that!