I have recently been using the Cross Realm feature to do World PvP. If you don't know how to utilize this feature for World PvP go here: http://www.ownedcore.com/forums/worl...-you-want.html (EPIC X-Realm zone PVP EXPLOIT - Kill players from any server you want!)
Anyway, I realized that while in these groups you could get some productive farming done while the other people in the raid are switching leader in order to switch servers. I know this works because I have been in Deepholm while in a raid with a leader that was on a different server, Kilrogg to be specific, and I switched to that realm when the raid was formed.
So basically the idea is that while you are in a raid that is doing Cross Realm PvP you are realm hopping to see if Aeonaxx or TLPD has spawned on a different server. This could be counter productive, there is a small chance that the rare spawns could spawn on your home server but it's definitely something worth trying.