So, in the heroic deadmines instance there are Cannons that people can jump into to do some more damage on AOE pulls. Well, the cannons when unused can be targeted and killed for rep with what ever faction you currently have the tabard for. This comes only out to another 200-300 rep per Deadmines, but every little bit helps.
Screenshots:
http://imgur.com/lLAyu.jpg
http://imgur.com/j3LZK.jpg