Yes, I have actually been working a bit on it with an a/me build. But so far it isn't fast enough to merit actual use.
Basically, I pull all the foes on the first level with the exception of the guys on the ledge into a ball. Then wastrels spam them to death. Next I pull the guys on the ledge and the new spawns into a ball and spike them. Depending on how well the spikes go and if the ball breaks affects the speed of it. Then you go into the second level and farm the dream riders and terrorwebs. As of right now, it is very touchy and a miss-timed skill could kill you.
Once I figure everything out I will probably post the build on guru or another forum like pvx so people can have a look.
http://beta.xfire.com/videos/4375c1, used bonder for HM. I haven't tested A/Me solo but that's generally how you would ball. There should be more up-to-date tactics and such by now. Then you kill whatever on second level.
The March 2011 update removed the dryders and riders from the first level, these are the only enemies that drop ectos. This was the nerf to ledge farm.