My squeak was most likely due to a ball joint needing some grease.
But get this: it's the lower joint that I just installed not too terribly long ago that was pre-installed in the LCA (figured doing the whole arm would be a good idea since the bushings at the frame might need to be replaced (I was wrong)). Why was it squeaking? Well, I don't think I could ever get grease into it. I'd put the grease gun on it, pump the handle, but all the grease would leak out around the zerk. Tonight I took the zerk off and found it to be caked full of "mud". Not sure how else to describe it. It was a thick, rusty colored goo that prevented the new grease from coming in. I cleaned up the zerk and got it flowing, reinstalled it and pumped out a bunch of gross looking grease from the ball joint. I took it for a drive and it seems to be nice and quiet.
But I did notice grease leaking from the passenger side CV boot. I can't find a hole, but the entire boot looks pretty old and dry. Says "made in Canada" on it. Factory CV axle?!?!? 236k miles.