"Tell Gridulator your layout width and the number of columns you want, and it’ll spit back all the possible grids that have nice, round integers… There are inline previews, courtesy of the canvas element, and when you’re all set Gridulator can crank out full-size PNGs for you, ready for use in your CSS, Photoshop docs, or what have you."
A handy little script that will walk through a site's sitemap.xml and map it out in OmniGraffle.
Using a font instead of images for icons is an interesting concept, which ensures that the icons are infinitely scalable and that the presentation can be easily changed on the fly without any extra page weight (even more so with CSS3).
I am curious where the tipping point lies in terms of page weight and render speed – 3 icons used, five…15? Either way, this is a really good start down an innovative path.
A useful collection of design patterns and user interfaces.