I am attempting to use the spiral tool to create a spiral that gradually increases in the size of the spacing (decay) between segments as it opens up outward. My problem with the spiral tool is that it offers little control of when, where and how much decay between segments occurs...
I've drawn an example of what I'm trying to achieve:
Abuzeedo has done something similar by "holding ALT" however I can't replicate it on my system (CS5, Mac).
reference: http://www.webdesign.org/vector-graphics/adobe-illustrator/spiral-tool -mysteries-solved.7694.html