Here’s the NoSQL landscape in 3 slides (and hey, at least mine looks different :) )
451 research published their view of the NoSql/NewSql world in a unified diagram.
Infochimps published a similar diagram
And here’s mine from SOA Patterns chapter 10 (discussing “SOA & big data”)
The first two seem to be missing Apache Solr, and all of them are missing ElasticSearch. Both powered by Lucene, which could be considered a NoSQL database on its own.