You can download and test the latest version(s) of the control from your account. However, the asp.net Ajax version of the chart control does not receive many updates, since development on it is limited, in favor of the SL/WPF counterparts. Nevertheless, you can download the latest dlls from your account, and give them a try.
All the best,
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!