I forgot last time: Spike will be proud that Buffy beat Illyria because he never managed.
Giles only asked if William knew Buffy; he didn't ask him about the picture he draw of her. He asked the wrong question I would say.
Mmmm William has to wear the amulet again? That lead to him being killed last time. That's a lot of pressure Giles puts on William there. But at last this way William has to meet Buffy again. Getting his demon back, the missing part. I wonder if that will bring his memories back too.