Updated list of B/S fics that work..
Alea's Recs
http://liveweb.archive.org/http://aleababe.livejournal.com/38012.html - Some may be broken, but most appear to be working.
http://web.archive.org/web/20040101160457/www.fanshoot.com/bsdiaries/buffyspike.html - same as above
http://www.angelfire.com/cantina/seablue/ - The Education of Buffy Summers by SeaBlue NC-17 WIP
Very very hot.. been a wip for a couple years now, but she says she is almost done with a new chapter so yay!! Headmaster/Student fic.. the links in the chapters are a little wonky around chapter 5, so you just have to edit them in the actual url for the story.. but soooo good. Just re-read it and soo good.
http://web.archive.org/web/20050213214907/http://www.pepperverse.net/william.htm - Mr William Series by Pepperland girl ( http://www.livejournal.com/tools/memories.bml?user=pepperlandgirl4&keyword=Mr.+William&filter=allAlternate Link ) NC-17
REALLY long series that i'm super glad I found through the way back archive. One of my favs
http://web.archive.org/web/20070221203400/http://www.whispersofeternity.com/GuiltyPleasures.html - Guilty Pleasures by Goldilocks
Gaaahh... can't wait to read this one again.
Website's still online
http://www.bloodshedverse.com/index.php
http://www.catnip.me.uk/main.html
http://www.sinister-attraction.net/
http://www.ripewickedplum.com/id178.htm
http://cordykitten.livejournal.com/308627.html
http://www.cryptoffic.com/ship/ship_bs_index.html
http://www.nocturnal-light.net/fanfiction/authors
http://www.spikeluver.com/SpuffyRealm/index.php
http://bscentral.jaded-paradise.net/index.php
http://www.fuzzyshark.com/forum/viewtopic.php?t=1231&postdays=0&postorder=asc&start=0
http://dark-solace.org/elysian/index.php
http://seasonal-spuffy.livejournal.com/