We have also integrated jQuery (http://jquery.com/) into Echopoint. This is an important feature as it opens a huge resource of good cross-browser widgets (have a look on this http://plugins.jquery.com/). We have already implemented three new Echo-components that takes advantage of this library:
Clock - Presents the current time (based on jClock).
DateField - This is both a date- and time picker (based on DynDateTime).
TooltipContainer - A pane container that can have an associated tooltip (based on qTip)
For those not familiar with Echo3 we can really recommend to take a closer look. The platform is now very stable and the performance is improved. And it is also very easy to implement new components.