I've been looking around the blogs for a good post about synaesthesia for a while now, especially as it was recently mentioned in the news, and the best, most informative, and with best links is this one, from Mind Hacks:
This can be turned into a blog-meme, e.g., what color (number, shape, taste, smell, etc.) you sense when you think of a particular blog? Pharyngula? Ocean-blue. Kos? Jet-black. Majikthise? Screaming Red. Would that be influenced by the color of the templates/skins?