kevinnuut:

I stumbled upon a great tool for discovering unused CSS.  Unlike Google Page Speed, which informs you of unused selectors for a given page, Dust-Me Selectors is able to spider an entire website using your sitemap.xml. It can then tell you definitively which CSS selectors are worthless.  I recommend this for anyone taking over a large project who needs to get that extra bit of speed.  Or, if you are CSS OCD…

Ohhh, I am progressively becoming more and more CSS OCD, so this is amazing. Thanks Kevin!