The Drizzle project is building a database optimized for Cloud and Net applications. It is being designed for massive concurrency on modern multi-CPU/core architectures. The code is originally derived from MySQL.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
xtrabackup is in the tree. There is a transaction_reader utility (for scanning / debugging/ generating SQL from the trx log) included in tarballs. OpenStack can now run via Drizzle. There are various bugfixes.