Este post es gracias a la recopilación de ligas que Hector Insua hizo en su Blog, y que me gustaría compartir por acá también.
Excel Services Compatibility Checker Addin - Beta
http://blogs.msdn.com/cumgranosalis/archive/2007/06/29/excel-services-compatibility-checker-addin-beta.aspx
Introducing EWA companion: A web-part that adds missing functionality to the EWA component
http://blogs.msdn.com/cumgranosalis/archive/2007/08/17/introducing-ewa-companion-a-web-part-that-adds-missing-functionality-to-the-ewa-component.aspx
AJAX Library for Excel Services
http://blogs.msdn.com/cumgranosalis/archive/2007/01/29/ajax-library-for-excel-services.aspx