I don't know how many developers here ride on the responsive website train but all the framework out there, or the ones i have come across, they are all pixels based. I created this framework out of the desire for a percentage based grid.

Info:
Barebone is a Beautiful Barebone Boilerplate for Responsive, Mobile-Friendly Development built on a fluid layout.

https://github.com/dayaki/barebone

Kindly let me know what you think, comments or bugs.