This is more "Dean instigates" than "Dean tops," but Exact Change (http://dontyouwaitup.livejournal.com/131671.html), by dontyouwaitup, is a fantastic story.

For top!Dean:

And the Highway Lines Pass By (http://philalethia.livejournal.com/190703.html), by philalethia
All the stories in rei_c's "Five Districts, Five Drugs" series. My favorites are That Phantom World So Fair (http://rei-c.livejournal.com/678549.html) and Blue Like Heaven (http://rei-c.livejournal.com/703539.html).
Balisong; No Murmur (http://assignations.org/spn/balisong.html) and Be Still (http://wordsmiths.net/Maygra/bestill.html), by maygra (warning: knifeplay in both)