(Wandering in via friendsfriends) Got about 6 recs here (http://www.exitseraphim.net/recs/buffygiles.html). I especially recommend the Death Brings Clarity trilogy. Ooh, and it's not linked on the page, but if you don't mind underage then I loved the Alternity series (http://www.buffygiles.com/archive/series.htm?id=447). And Sew the Chicken (http://www.buffygiles.com/archive/mix/chicken.htm). Chocolate Ice (http://www.boadicea.net/buffy/fanart/choco01.htm) is fun, too.

buffygiles.com (http://www.buffygiles.com) has a ton of fic, but as with all archives it's a question of panning for gold.