Erik Swenson on OpenReports has developed an AJAX Report Viewer. The OpenReports Report Viewer is a functional demo application created to illustrate the use of the new report generation and scheduling API available in OpenReports 2.1. Demo
The Report Viewer uses an AJAX user interface that was developed with the Yahoo! User Interface Library and Jack Slocum’s excellent YUI-EXT library. If you are looking for an AJAX library, be sure to check out YUI and YUI-EXT. I’ve found the combination to be an excellent alternative to Dojo library currently used in OpenReports.