The Open Data Model site was launched recently.
It’s aim is to:
“bring together data modelers and subject matter experts both from IT and business. The purpose is to reach consensus on the best way to represent any given set of facts, by ensuring those facts are truly understood.”
Effectively to build up a set of conceptual models for different domains which can then be used as starting points in modelling efforts.
(As far as I am aware) It has only been running for a few weeks and has already built up some really useful resources.
Definitely worth taking a look at.
Note you have to register to access most parts of the site.