This is... generally accurate and complete. More than that I can't really promise.

Xander Pairings:

Xander/Ethan

Wall Series (also Xander/Giles and Giles/Ethan)

Calendar Boy

Glamour (also Xander/Giles and Giles/Ethan)

Xander/Anya

Care (also Xander/Giles)

Morning Warm

Priceless

Xander/Giles

Summer Reading Series (four stories)

Unscathed

Bananarama

Random Hot Tub Fic

Xander/Angel

Cell Series (two stories)

Plastic

Tell

Tell The End

Xander/Oz

Strays Series (seven stories, with some Giles/Xander)

Desert Fruit Series (two stories)

Pineapple

Zoo

Cantaloupe

Transfer

Xander/Oz/Devon

Mix Series (two stories)

Miss Finchley Bent Over

Xander/Willow

Warmth

Xander/Spike

Post-Grad Series (six stories)

Kisses

Heat

Beach

Night Watch

Expert Care

Xander/Larry

Kisses

Xander/Joyce

Cocoa

Xander/Riley

Swing

Special

Xander/Gunn

Swapverse Series (two stories)

Xander/Caleb

Times like these

Xander/Various (tends to be both het and slash)

Fives Series (three stories)

Relax

Xanderslut
 
 

Giles Pairings:

Giles/Ethan

One For Series (two stories)

Then He Did

Continuum

Loved

Road

Brass (with Spike)

Morning Warm

Higher than soul can hope

Crash

Record

Giles/Kendra

Kisses

Giles/Oz

Traveler Series (also fanged four pairings)

Strength

Giles/Angel

Saber

Giles/Wesley

Clear

Giles/Buffy

To rise above

(more Giles stuff available in Xander/Giles and Xander/Various as well as in 'A Lot' and 'Mostly Gen')
 
 
 

Faith Pairings:

Faith/Buffy

Alive

Faith/Drusilla

Debts Series (eight stories, also Faith/Buffy)

Faith/Cordelia

Brand New Thing

Faith/Other

Feeling It

(see also 'A Lot,' 'Mostly Gen,' and Crossovers)
 
 

Drusilla Pairings:

Drusilla/Ethan

In Flight

Drusilla/Buffy

Forget-me-not

Drusilla/Darla

Whore

Lady Sings

Drusilla/Various

In their eyes: Drusilla

(see also 'A Lot')
 
 

Willow Pairings:

Willow/Spike

Compromises

Willow/Tara

Is

(see also 'A Lot' and 'Mostly Gen')
 
 

Ethan Pairings:

Ethan/Oz

Unpossessed Country Series

Under

Ethan/Wesley

Happiness (also Wesley/Angel)

(see also 'A Lot' and Crossovers)
 
 

Devon Pairings:

Devon/Oz

Lipstick Boy

(see also 'A Lot')

Spike Pairings:
 
 

Spike/Angelus/Drusilla

Killing Will

Spike/Holden

(Un)defined

Spike/Buffy

Sympathetic

(see also 'A Lot')
 
 

Wesley Pairings:

Wesley/Angel

Thorn

Edge

Comfort

Responsibility

Fast and Dirty

On You (also Wes/Gunn)

Behind the Eyes

Tidy

Wesley/Gunn

And the more we get together... Series (two stories)

Easy

Overdue

Slick Like Water

L&H

Love

Rough Beast

A Question of Style

Shut up, Wes

Amends the next time

Wesley/Dawn

Repercussions
 
 

Angel Pairings:

Angel/Cordelia

Line
 
 

A Lot of Pairings:

Cicatrix Series (five stories)

Improvs (also includes other fandoms)
 
 

Mostly Gen/Parody (iirc):

Xander

Just As Foxy As Can Be

Xagnar the Vamnpyrre Sleigher and the Eye of Potatoe

Stuck in the middle

Legends of the Not Very Dark At All Knight

On Faith

And everything in its place

Over and Out

Conversation

Magic Mirror

Strings

Reap

Priorities
 
 

Crossovers:

Faith/Krycek

Gangland Series (three stories)

Faith/Blair Sandburg

Thrift

Oz/Lex Luthor (SV)

High Corn Drifter

Ethan/Nightcrawler (X2)

Showtime

Ethan/Steerpike

The dancer from the dance

Oz/Nate Grey

Little Gods

Ethan/John Constantine

Border Men