Nice, not familiar with Pixate, but I wonder if the author has considered making this work with SCSS too :) That'd be pretty bad ass if it could be done fairly easily and would be nice for styling nested layouts.
In a different conversation about Pixate (a few days back) I mentioned LESS and SCSS/SASS and I suspect as long as you write your CSS parts to conform with Pixate's standards, your SCSS code should work fine since the pre-processor will compile it down to CSS anyways.