In my own, personal canon, all the Jantosnogging has transferred so much energy to Ianto that he'll spontaneously revive. In a very End of Days-ish sort of way. *nods decisively*

IANTO IS NOT DEAD, DAMMIT.

Apart from Ianto's not!death (I refuse to believe it...), I absolutely loved the episode, though. It was BRILLIANT. Well, except for, you know.