If you haven't heard of Redis, you might want to check out Kevin van Zonnevald's blog post detailing how to install the memcached-like caching server, and how to code with it.

You can use Redis as a database, queue or a cache server. It stores its entire dataset in memory, so it's "crazy fast," van Zonnevald said.

Read the whole story: http://www.developer.com/daily_news/article.php/396534/Fast-Caching-with-Redis-and-PHP.htm