Agreed on Leo. My boss has been studying Polynesian/Marquesian for many years and is really doing the thing out here. He lived in Tahiti and married into a Tahitian family and had a traditional education for that particular style. Check out Aleksander: http://northeasttattoo.com/section/70655_ALEKSANDAR_NEDICH.html
What I personally like is that no matter what style tribal, as long as it's drawn well and is of proper size, it has a really dramatic effect! In really like the positive/negative space relationship with that stuff.
Stewart, defnitely agree on what Thomas Hooper is doing. He is sort of reinventing the stuff, and I love the stippling!
Cheers