Steven: It does take into account multiple monitors but it treats the screen space more like a continuum so if it's on the right screen, it should sound more to the right than something on the right of the main screen (which will still appear to be off to the right, just not as much). It definitely does need tweaking though and I'm sure one could get a better mapping of the screen space to the sound space with some focused effort.

Tony: I'd love to see what you end up doing with this in Hyperspaces. Drop me a note if you release it with positional sound in there.

Gabe: Interesting. Do you recall if this was this done in conjunction with visual input (i.e. showing a crowded room full of people talking) or just audio only? Got a link to the study?

In any case, thanks for the comments all. I'm glad you guys found it interesting.