Johnny Joints are WIDELY used in the off road afermarket and are very reliable.
personally am using 12 of them on my truck. they have been there for over 2 years, I drive my truck on the street and of course off road.
I'm honeslty really bad bad about keeping mine greased and i haven't had any problems with them. Johnny Joints are the original rebuildable polyurethane bushed johnny joint.
If for one reason or another they start to develop play in them, they are rebuildable.
Here is a video on the Johnny Joint: http://www.streetfire.net/video/Currie-Johnny-Joint-Video_710301.htm
The links are sold in pairs.
they will ship unpainted or coated, as bare steel.
We were originally going to powder coat them but figured that no matter what you coat it with, once you bang them on rocks, the coating will scrape off. by simply rattle canning them, you have an easy way to keep them coated and rust free.