One of the more interesting analytics stacks being built on top of Hadoop
is coming out of UC Berkeley.
https://amplab.cs.berkeley.edu/software/
Particularly interesting is SparkR, which they just blogged about here:
https://amplab.cs.berkeley.edu/2014/01/26/large-scale-data-analysis-made-ea…
We don't want to get ahead of ourselves; after all, we're just starting to
get some page view data into HDFS, but it's important to understand that
one of the reasons we like Hadoop is the ecosystem of open source tools
built around it.
-Toby