Rails app on DH?

What are others using as their environment setup on DH for rails applications?

Currently, I’m just using the default mongrel server (one instance per application). This handles all requests (static and dynamic).

I’m concerned that it may not be enough and if installing a local mongrel cluster support would improve performance at all.

Also, has anyone gotten apache to server all static requests (images, css) while still using mongrel to process the rails requests?