[Update June 2013]
An official location for the Windows Server 2012 Cluster Updates can be found here:
For Windows Server 2012 clusters it was still very difficult to find a complete list of hotfixes. In the past there were blogs and other locations for Windows Server 2008 R2 Hyper-V and clusters, but not always authorized by Microsoft. This could cause a trust issue for customers who don’t want to rely on some blog.
As MVP’s we have also expressed a wish to see an official list which is maintained by Microsoft. It is great to see our request is honored so quickly and you can now find the Windows Server 2012 Cluster hotfixes
Here is a message from John Marlin, Senior Support Escalation Engineer Microsoft Enterprise Platforms Support:
In a previous blog, it was discussed on where you can get a list of the Failover Clustering and Hyper-V hotfixes for Windows Server 2008 R2.
In this blog, we give the links to newly released hotfixes for Failover Clustering and Hyper-V so you know what hotfixes are out there. There are two Wiki pages that will make life easier for you when looking for hotfixes for Windows Server 2012 Clustering and Hyper-V.
These Wiki pages are updated on a regular basis. You can setup an RSS Subscription to the Wiki page so you can the updated Wiki page in your favorite RSS app or Outlook.