currently this page is scoring an 82 on YSlow. Needs to make use of a CDN. Needs to add expires headers to external resources, and Needs to Configure ETags.
Really, what does YC need a CDN _for_? Just because YSlow says it doesn't mean it's actually a sane idea. They also say to turn off ETags, when what's actually good advice is to set up ETags in such a way that it works.