Fluid Grid Using Text-align: Justify
A new technique for responsive grids I've been working on which uses inline-block and text-align: justify.
Take a look at this article for an explanation of the fundamentals of the technique:
Essentially, margins are calculated by the browser and never specified in the CSS. This saves a lot of tedious work! Also by not having to use floats, clearfixes, or nth-child, we avoid many common problems associated with more traditional methods.