Nice post Mooch! Here's links to several very informative articles on corals and flow;

http://www.advancedaquarist.com/2006/6/aafeature2

This is the first article in a series of 4;

#2 http://www.advancedaquarist.com/2006/8/aafeature/view

#3 http://www.advancedaquarist.com/2006/9/aafeature2/view

and #4 http://www.advancedaquarist.com/2006/11/aafeature/view

Also, not to steal or side track your topic, but perhaps it might also help this topic on ideal types and rates of flow get off the ground;

Ideal Flow in a Zoanthid Dominated Aquarium

And for those who want to talk about methods for generating flow, please check this thread;

How are you getting Flow in your Tank ?

I'd really love to see some more info/thoughts/observations on how the new vortex affect zoa/paly health, and which settings in particular, as well as other methods for generating random flow patterns in the tank.

Mooch, you've obviously had a lot of experience with both zoas and palys, perhaps you could give us the benefit of your observations in that first thread on types and rates?