Twitter’s Nick Kallen:
Cache Money is a plugin for ActiveRecord that transparently provides write-through and read-through caching functionality using Memcached. With
Cache Money, queries are automatically cached for you; and similarly, cache expiry happens automatically as after_save and after_destroy events.
This doesn’t just apply to trivial queries. Very complex, sophisticated queries are handled effortlessly; the vast majority of ActiveRecord usage is transparently materialized, indexed, and kept fresh in Memcached.
I’m slightly skeptical towards magic like this, but it definitely sounds interesting.