We have rescheduled the official release of the new HTML/JS based ReportViewer. Please follow the information on our Roadmap
for ETA. Since we want to assure that the new feature in our product will be on the needed level, you may expect a demo version before the official release to test it on your own.
Have you tried the new visualization options in Telerik Reporting Q1 2013? You can get them from your account.