Take a look through my favorites:
http://www.fanfiction.net/~kojishi
With the exception of Chasing Methuselah and a smattering of Justice League they're Sess/Kag fan fictions. I recommend any of them as they are well written (Character development, plot line, dialogue, style and also grammar).
One that I've been keeping my eye on for updates is
Utopia by Kagome357 .
Summary: Sesshomaru is Taiyoukai of Eastern Asia. Kagome is a mortal woman unaware of her powers. In a future totalitarian society ruled by demons where humans are relegated to third class citizenship, will their forbidden love overcome the laws of the land? MA
It's AU and she does a lovely job of painting her futuristic society.