To pimp a new favorite fic:

sajj has been writing a wonderful post-Grave fic, original take on the whole S/B tale. Dark Tides is a WIP, and that is my *only* complaint. It's a fascinating theory on what's up in the Buffyverse, and her writing style is unique. Beautiful, beautiful language. Slayer history and Spike history are interwoven with dreams and real-time narrative that provides us with an explanation for why two such opposites are drawn together...

Oh! And this fits your 'psychic connection' criteria, I think, harmonyfb.

Go read. Now. And feed the author!