Experimental Chaos Conference - http://www.personal.psu.edu/nvc3/ecc/ A biennial meeting that focuses on the forefront of experimental work in the field of chaos and nonlinear dynamics. Ninth meeting: Sao Paulo, Brazil; 29 May -- 1 June 2006.
Let's Face Chaos through Nonlinear Dynamics - http://www.camtp.uni-mb.si/chaos/ International Summer School/Conference series, held in Slovenia approximately once every three years. Seventh meeting in 2008.