As you know the jQuery branch has been merged to the trunk.
I suggested to use jQuery.noConflict(); and to keep using jQuery( instead
of the $( shortcut
In the trunk I finally think we should continue to use "jQuery( instead of
the $( shortcut" to allow custom project to use other libs but we don't need
"jQuery.noConflict();" because OOTB there are no other js libs so no risks