Half Shaft Assembly!
aka Intermediate Shaft (Haynes Repair Manual)
aka Jack Shaft (www.partsadventure.com)

gonna cost me $50 plus shipping.

Don't know if y'all are familiar, but I ran into a problem when swapping my CV Joints (getting *INTIMATE* with my car this weekend
). I couldn't get the driver's side inner cv joint housing seperated from the intermediate shaft. In my attempts to separate the two, me and my buddy banged up the bearings in the intermediate shaft. Well, after putting it back together, I now have this annoying vibration when accelerating or coasting. But if I'm in neutral, everything rolls smoothly.