Here's a list of previews that need fixing:

rich:calendar won't popup, and puts the button in the wrong place
rich:dataDefinitionList broken
rich:dropDownMenu nonfunctional
rich:panelMenu nonfunctional
rich:panelBar functional, but rendering is broken
rich:toolTip nonfunctional
rich:modalPanel nonfunctional
rich:dataTable broken
rich:tree sorta works, but the nodes are not functional and don't render as links
rich:inputNumberSlider and other sliders are ugly
a4j:status should show some kind of preview