RoR site slow at starting up

Our entire site is written with ruby on rails, it works fine under dreamhost, but the first time hitting the page it takes at least 30 seconds to load. Just says “waiting for…”. We have fast-cgi enabled and have done the modifications listed in the wiki. After the page has loaded the first time it is really responsive, but that initial wait is quite annoying.

It’s not a huge site we get maybe 50 unique visitors a day.

Anyone have any ideas or suggestions?