"Warm Up Cache" on deployment

Question

I am wondering if anyone has any plugins or capistrano recipes that will "pre-heat" the page cache for a rails app by building all of the page cached html at the time the deployment is made, or locally before deployment happens.

I have some mostly static sites that do not change much, and would run faster if the html was already written, instead of requiring one visitor to hit the site.

Rather than create this myself (seems easy but it lowwwww priority) does it already exist?