Graph update
This is the first of several articles on the graph/RDF (and hypergraph) space. This one is generic, the others will be product/vendor specific.
How graph databases solve previously unsolvable business and technology challenges
What sort of problems do graph databases solve and what sort of use cases are there? Also, what sort of data graph databases map to which sort of use case?
Consolidating graphs and other matters
The graph database market is starting to consolidate. There are also interesting graph and associative database developments
Big data storage options
If you implement a different database on top of Hadoop is it still Hadoop? If you replace the file system in Hadoop (or MongoDB) is still Hadoop?