If you have found a use case for Big Data, but have been putting it off because you don’t want to have to learn Hadoop and Map/Reduce, I encourage you to look at Oracle Big Data SQL.
This product allows you to use regular SQL to query data sources across relational, NoSQL and Hadoop data sources. As usual with Oracle, it has been cleverly optimized to join data in the most effective way.
For now, it requires you to buy a couple of racks of Oracle hardware (an Exadata and a Big Data machine), but Oracle has announced that it will be available as a cloud service as well.
I’m giving this an up arrow on my Oracle Trends list.