Here are some blog posts on the Ribbon Workbench for 2011:

1. How To Guide from PowerObjects -  http://www.powerobjects.com/blog/2012/07/09/guide-for-crm-2011-ribbon-customization/
2. Disable Buttons based on entity permissions - http://blog.customereffective.com/blog/2012/05/managing-activatedeactivate-permissions-of-crm-entities.html
   
3. Review - http://danielcai.blogspot.co.uk/2012/05/one-and-only-crm-ribbon-editor-that-you.html
   
4. Review - http://mscrmtools.blogspot.co.uk/2012/05/ultimate-ribbon-designer-ribbon.html
   
5. Review - http://crmblog.sentri.com/2012/04/ribbon-workbench-tool.html
   
6. Review  - http://www.crmnerd.com/tools/crm-tool-of-the-week/crm-tool-of-the-week-ribbon-workbench-for-dynamics-crm-2011/
   
7. Add Drop down menus to ribbons - http://crmblog.sentri.com/2012/04/adding-drop-down-menus-to-ribbon.html
   
8. Rename a standard tab - http://www.develop1.net/public/post/Rename-a-standard-CRM2011-Tab.aspx 
   
9. Make sure your ribbon buttons appears in Outlook -  http://www.develop1.net/public/post/Make-sure-ribbon-buttons-appear-in-Outlook.aspx
   
10. Ribbon Scaling de-mystified - http://www.develop1.net/public/post/Ribbon-Scaling-De-mystified.aspx
    
11. Add Drop down menu - http://www.develop1.net/public/post/Add-Dynamic-Menu-to-Ribbon-Button.aspx
    
12. Add button to subgrid only to a specific parent entity - http://www.develop1.net/public/post/Add-button-to-Sub-Grid-but-only-when-on-a-specific-parent-entity.aspx
    
13. Re-arrange buttons in standard groups - http://www.develop1.net/public/post/Re-arrange-standard-Ribbon-Buttons-by-customising-Ribbon-Group.aspx
    
14. Enable/Display standard ribbon button based on a form value - http://www.develop1.net/public/post/Dynamically-ShowHide-a-standard-ribbon-button-based-on-a-form-value.aspx
15. Customize your Mirosoft Dynamics Ribbon - https://community.dynamics.com/product/crm/crmtechnical/b/crmpowerobjects/archive/2012/07/09/customize-your-microsoft-dynamics-crm-ribbon.aspx
    
16. Getting Guids from a selected records in a grid - http://gotcrm.blogspot.co.uk/2012/09/crm-2011-ribbon-workbench-getting-guids.html?spref=tw 
17. Ribbon Button on Homepage to Open Dialog for Selected Record - http://www.yousa.co/index.php?option=com_content&view=article&id=141:ribbon-button-on-homepage-to-open-dialog-for-selected-record&catid=86:navigation-and-layout-sitemap-ribbon&Itemid=474
18. How to refresh Associated or SubGrid from Ribbon button - http://a33ik.blogspot.co.uk/2012/11/how-to-refresh-associated-or-subgrid.html
    

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