On: MySQL now includes memcached, and a plugin that allows fast NoSQL-style access

[nnk]

What you've described it's MySQL query cache.

MySQL memcached is a memcached deamon that uses InnoDB storage instead of in-memory storage. The caching is done by InnoDB itself.

(and actually it's possible to enable the optional in-memory storage too)

http://dev.mysql.com/doc/refman/5.6/en/innodb-memcached.html