The latest updates can be found on this technet website: http://technet.microsoft.com/en-us/sharepoint/ff800847

I was looking for the August 2011 updates. They are not released yet. But I found an interesting text on the page:

The packaging of cumulative updates changed as of August 31, 2011. The following packages are provided for cumulative updates:

• SharePoint Foundation 2010
• SharePoint Foundation 2010 + SharePoint Server 2010
• SharePoint Foundation 2010 + SharePoint Server 2010 + Project Server 2010

As a result of the new packaging, it is no longer necessary to install the SharePoint Foundation cumulative update and then install the SharePoint Server cumulative update.

That’s great news! Thank you Microsoft!