The main new feature is, to allow obtaining a sortable table with little effort. By specifying a sortable=true attribute on the dataTable, command sort header components will be automaticaly added to each column header, if not present already, wrapping the current content of the header facet, and the sorting will be performed by the property obtained from the output component displaying the cell's content. Using the t:column component for the columns, will allow specifying also the default sorted column, using the new defaultSorted=true attribute.
The actual sorting by columns is handled by a new SortableModel, integrated into MyFaces from ADF Faces, which acts as a wrapper for the current model, and uses row object's properties to perform sort.
I created also a new page in myfaces examples/simple, to show how can this be used.
I think it's a nice feature to have, and could be further enhanced, i hope you guys will feel the same.