I would like to have the ability to enable report books in the designer of reporting server this would be a big advantage to our company as well plan on making telerik reporting server are main goto product for reporting in house we are impressed so far but a few issues like not be able to produce a work sheet with multple sheets is a big draw back for us I would see it working that you can add muitple tabs in the designer and attach sql data source to each tab this would be great