All Experts is a competitor of About.com.
They have just started a section for Post-Relational Databases and are
seeking experts who are interested in answering questions. I've signed
up but they'd should have more than one voice available. The link
below can be use to ask questions or to sign up as an expert.

http://www.allexperts.com/el/3779-9/...onal-Databases

Please note, this is fee-free. Experts on All Experts are *not* paid.