nginx? page caching? reverse proxy?

I'm planning the deployment for a grais app, and am very excited about cloudfoundry .

So far I'm loving the experience, however I'm curious what the best practice is regarding page caching?

Eg to maximize scalability, how might one reduce load on the server by caching certain pages? Someting like what one might do with nginx acting as a reverse proxy in front of the app container?
Any options with CF?

Thanks!