DB Guy writes: An article over on Read Write Web on what the future of relational databases look like when faced with new challenges to its dominance from key/value stores, such as SimpleDB, CouchDB, Project Voldemort and BigTable.
The conclusion being that relational databases and key value stores aren't really mutually exclusive and instead are different tools for different requirements.
"The fundamental principle of science, the definition almost, is this: the
sole test of the validity of any idea is experiment."
-- Richard P. Feynman