Been doing some light reading on this (yet another) touchy I.T subject.
http://www.readwriteweb.com/cloud/2010/07/cassandra-predicting-the-futur.php
Some sound ideas masked by dread by DBAs? Or another ‘thing’ that may get marginalized.
This Blog has a nice visual diagram with related systems.
http://blog.nahurst.com/visual-guide-to-nosql-systems
The right tool for the right job.
http://en.wikipedia.org/wiki/NoSQL