> This is the main reason my large employer didn't even bother to seriously look at what their products had to offer. Both 10gen (Mongodb) and one of the companies offering Cassandra support contracts were a lot more reasonable.

When we contacted both 10gen and Basho a few months ago, Basho's support rates were cheaper than 10gen. We didn't look at Datastax at the time, so I can't comment on that comparison.