Misha Schneerson has now made the Shim Wizard for VS 2010 available for download. What should be noted is that the new version is not officially released by Microsoft and it’s not officially supported. For more information please see COM Shim Wizards for VS 2010.
In view of the fact that VSTO is getting better and better for every new release the need to use managed COM add-ins will decrease. Especially if we only develop for one software within the Office suite. Perhaps this new version of the Shim Wizard will be the last one?