Telerik released a new CTP that fixes most of the bugs has been issued in the August CTP like

1- there were no way to select property to be Title and Summary for the Atom Feed

2- the application is working only on a specific version of Telerik OpenAccess

So what they add new is The Automatic Version Selection for Telerik OpenAccess , through saving different version of Telerik OpenAccess in version store and load them when needed on the fly,

and the second feature was adding a property selector when the user wants to generate Atom Publishing WCF service,  so the can choose which property for each entity will be the Title and which one will be the description,

also this release include  some UI enhancements.

So to get the latest version all what you need to download it from here

and you can read more about the tool here:

http://www.telerik.com/community/labs/telerik-openaccess-wcf-wizard.aspx