Alrighty. Since I'm feeling generous, and no longer really need to farm anymore, I figured I would share one of my farming spots. It's located in Ilum. Map:
Essentially, you are going to be farming ONE mob -- a level 50 Champion, named "Graymane". Located at (754, 1187). He is buried pretty deep in that crevice (not a cave or anything), so if you don't see him at first make sure you go in pretty deep. If you STILL don't see him, he probably was recently killed.
While I know he's a champion, he's actually fairly easy to take down with a decent companion and decent gear. I was able to do it on my sage healer with a mix of blues/epics and a crappily equipped lizard man; in fact, you can even kite him pretty easily if you don't want to use a "tank" type companion. Nothing really special about him -- he has one knockdown he uses from time time, but nothing that should one shot you or anything of that nature.
He has about a 10-15 minute spawn timer, and drops quite a bit of orange level 50 items - guns, armor, lightsabers, mods, etc. etc. He does drop blues/greens as well, so don't get discouraged if you get a few of these in a row -- farming him for about a hour should get you 2-3 level 50 orange items. In fact, what I typically did would kill him in the downtime while waiting for PVP queues. When i was out, he'd be back up and I'd kill him again. If that wasn't enough incentive, he also be humiliated even moreso by scanning his corpse when he dies via bioanlysis and harvested (kind of a sort of t-bagging as it were).
Anyways, I hope this helps some of you. He's netted me quite a bit of cash from the orange items via the GTN - the drops usually net me 25k-100k per item, depending on the mods and the item.