We don't need a database?

I remember an article last year on Slashdot about a research project at IBM that had created a way of storing all objects an application needs in memory, with no relational database needed. That project was called Prevalence, and it was remarkable in its simplicity. There is a Java implementation of it called Prevayler.

The .NET version of it is called Bamboo.Prevalence. I'm going to do some Proof-Of-Concept work with it to see if it's interesting at all. Will advise...