Just in: the 2010 Imagine Science Films Festival's Nature Scientific Merit award, given to "a short film that exemplifies science in narrative filmmaking in a compelling, credible and inspiring manner," is An Eyeful of Sound, a short film about audio-visual synaesthesia by Samantha Moore.
Here's the trailer:

An Eyeful of Sound - trailer from Samantha Moore on Vimeo.
It's a little hard from that clip to get a sense of what the film is like. But it's great that an organization is finally calling attention to science-themed short films. Bravo, ISFF.
Related: The Eyeful of Sound…