You could start here. 

http://www.openarchives.org/pmh/

Mark
________________________________________
From: Code for Libraries [[log in to unmask]] on behalf of Wilhelmina Randtke [[log in to unmask]]
Sent: Thursday, February 07, 2013 2:03 PM
To: [log in to unmask]
Subject: [CODE4LIB] Directories of OAI-PMH repositories

Is there a central listing of places that track and list OAI-PMH repository
feeds?  I have an OAI-PMH compliant repository, so now am looking for
places to list that so that harvesters or anyone who is interested can find
it.

-Wilhelmina Randtke