Alexander Netkachev, an adamant user of the Zend Framework, has posted his own review of one of the new modules found in the Preview Release 0.1.4 - the Zend_Cache

Issued Zend Framework 0.1.4 preview release comes with new interesting caching classes. I tested them at this weekend and I'm glad to say that they can speed up your application dramatically.

He covers what it is, what the interfaces for the API are, and the backend storage methods it offers. There's a few notes of advice he has to share from his experiences with it - items that have already been fixed in the trunk version (from the subversion repository).