Just out of interest, have you explored using the Apps for Office functionality? I think it could provide a more robust solution (robust in the sense that it's

Just out of interest, have you explored using the Apps for Office functionality? I think it could provide a more robust solution (robust in the sense that it's supported by Microsoft) for integrating web interfaces into Excel. Basically it allows you to build Excel extensions using HTML/CSS/JS. I could understand using COM before Apps for Office was available. http://dev.office.com/docs/add-ins/overview/office-add-ins http://dev.office.com/docs/add-ins/overview/office-add-ins