Nobody so far
episode 134-138 is the final battle between sasuke and itachi
no when your clan is dead its dead he could always make a new uchiha clan though
saskue and itachi fight, and in the end itachi died, in order to save and protect his younger brother
Most of the statement above this one is true except the part about Itachi giving Sasuke his mangekyou sharigan to destroy the leaf village. Itachi always wanted peace and thinks Susake might go after the village if he found out the truth, so he have Naruto some of his power before the fight.
Nobody
SAKURA
Not so far
the first thing he says to her is, "sakura..."
sadly... no. sasuke aint dead. YET. >=D
We do not yet know (as of 1/20/09) no :(
in the manga naruto is going to do what ever it takes to stop sasuke