Reporting on Exchange Emails

There is an OLE DB provider for Exchange that is built into Exchnage and one for HTTP DAV somewhere (I think it is called 'OLE DB for Internet Publishing') but I can't remember where to find it right now.

There are also some third party products that extract statistical information from Exchange (Microsoft Operations Manager http://www.microsoft.com/mom/default.mspx and Exchange Reporter at http://www.ssw.com.au/ssw/ExchangeReporter/ are two that come to mind).