I am a big believer in caching. I put all of my sites behind Amazon Cloudfront. Not only is your content cached, it is also served from a server close to the

I am a big believer in caching. I put all of my sites behind Amazon Cloudfront. Not only is your content cached, it is also served from a server close to the user. Cloudfront now has support for cookies, query strings, and behaviors based on url pattern. It's a pretty robust offering for the price.