Initial release. There are providers for "number" (any of the 3 CCK number fields), "nid" (CCK nodereference) and "uid" (CCK userreference). If you need more, you need to code them yourself - but it's easy to do so, and can of course be done without touching this module (just implementing the appropriate hooks).
Have a look at value_provider_content_provider_base() combined with value_provider.providers.inc for an example.