Can anyone recommend a completed fic where either Buffy or Spike can hear the other's thoughts, one that's not AH?
Thanks!

Well off the top of my head this one is a classic.

If You Could Only Hear by Sabershadowkat

http://www.sabershadowkat.com/buffy/onlyhear.html

How Earshots could go.
Buffy is able to hear people's thoughts and finds Spike's most amusing.
Snippets from: Annie, The Muppets, Happy Days & ER
Post Enemies (Rated NC-17)

My "Just a Little Spell" has them able to hear each other's thoughts. You can find it here on TSR, or at http://spuffystuff.org/spell.htm

This one has it.

Connection by ya_lublyu_tebya

http://www.bloodshedverse.com/stories.php?go=chapters&no=9051

During Willow's thy-will-be-done spell, a little inadvertent claiming takes place and Buffy's life will be changed forever. Just how will she cope being connected to the vampire that is the bane of her existence? Complete

Great suggestions, thank you!

Whispers in the Dark by Ashlee
Summary: Battling a demon on a routine patrol one night, Buffy is seriously injured. When Giles realizes the full extent of the damage, he knows there is only one person who can help her get back to the Slayer she used to be.
Categories: General NC-17 Fics Characters: None
Genres: Romance, Angst Warnings: Violence, Sexual

http://spikeluver.com/SpuffyRealm/viewstory.php?sid=7161&warning=NC-17

I found this one - by Dee Bradfield & LOVE IT. It has sequels but the first is my favorite:
http://www.fanfiction.net/s/791123/1/Shades_Of_Grey