Ahh, you want YnM fic??? Do you have any favorite pairings??

Here's some that have caught my eye:

Sympathy for the Devil by Elysia: http://www.angelfire.com/id2/avalon/sympathy.html
During Demon's Trill, a possessed Tsuzuki comes onto a Hisoka in disguise. Hot and angsty. (TsuxHis)

The Bargain by Bonne-Von project: http://www.no-assumptions.com/gundamwing/ynm-bargain.htm
Very, very hot MuxTsu fic. Tsuzuki agrees to submit to Muraki for one night if he promises to stop tormenting Hisoka. There are other stories in this series, but this first one is the best and works as a standalone.

Leareth's fic: http://doki3.net/void/
Leareth is a great writer. She's done a series of fics in YnM, mainly TatxTsu.

Here is a fine recs blog with lots of YnM stuff: http://easilydistracted.blogspot.com/

Hope this helps!