[cbzbc]

Leaving aside NoSQL db's - there's also a ton of normal SQL databases wide open, I don't think hype is necessarily the issue there.

[nineteen999]

Sure, maybe your average garden variety Postgres or MySQL instances, and probably some MS-SQL as well. Companies that have a large investment in commercial RDBMS (eg. Oracle, DB2, etc) tend not to be so careless in my experience.