1. Synesthesia
from the 2nd Annual Conference on Synaesthesia in Hanover, Germany. Cortex; Volume 42, Issue 2 (February) Cognitive Neuroscience Perspectives on Synaesthesia. segment on Synesthesia Also, Seeing life in colors:
http://home.comcast.net/~sean.day/Synesthesia.htm

2. Synesthesia and Artistic Experimentation
Cytowic argues that such deliberate contrivances are qualitatively different from the involuntary experiences that I am calling synesthesia in this review (Cytowic, 1995, section 3.7) He defines synesthesia as the involuntary physical experience...
http://psyche.cs.monash.edu.au/v3/psyche-3-06-vancampen.html

3. Synesthesia - the mixing of the senses
Synesthesia - the mixing of the senses. There is the suggestion that " every infant is synesthetic, although most gradually grow out of it" p 12 (Stein and Meredith 1993) The term synesthesia means the joining of senses, and the implication is...
http://members.ozemail.com.au/~ddiamond/synth.html