"MongoDB Inc., capitalizing on the popularity of its online database software, raised $150 million in a venture-funding round that would make it the most valuable Internet startup in New York...
The round values the company at $1.2 billion..."
MongoDB is simple, fast, free++, open source
MongoDB Overview | MongoDB, Inc.
In fact price of NoSQL databases is comparable with SQL Server and Oracle,
and those prices are going up over time... as amount of data and speed requirements...
