I ran across a tweet about this on infoq.com and thought it was pretty interesting. MySQL Cluster 7.2 Released with 70x Increased Performance and NoSQL Features.
I know that there are several companies that are using MySQL in a nosql style, usually simplifying and de-normalizing the schema, doing mostly key access, things like that. It's pretty neat to see Oracle trying to take things to a new level with MySQL. I'll need to look into this some more.