Kevin is one of my favorite hosts. I still kick myself for not taking autobody in high school when instead I took shop. My shop teacher was a friend of my dad's and he gave me crap for 3 years for taking shop when I knew the stuff already.

Dad was an ASE mechanic, and I grew up in the garage helping him.
I like the body tips, and plan on a cheap paint job on the XJ.
As for the Cheep Cherokee, I'm glad they didn't use Rusty's. The socal guys have broken a ton of that stuff. Most everyone out here runs RE, since it's Hammer tested (Johnson Valley Hammers).
Those rock rails are going to lever right into the rocker on a good hit. They may be fine back east but again, we have rocks.
The bumper looked liked it used the stock mounts, which will pull out if you give a good tug on it. Tie the bumpers into the frame rails like those factory hooks you tossed. The factory tow hooks on the XJ are a very nice piece, and I'd be willing to bet you could airlift a cherokee with them. Highly desireable for guys with stock bumpers as recovery points are pretty much required on runs out here.
Overall though, great build, and I'm sure it will get more people into the XJ fold. If you want to see what we do with them out west, search for user kevin3151 on youtube. He's put up some great vids from trails around socal.
Oh, and if you weren't aware, Richard Gauthier (sp?) aka goatman took 7th in a Cherokee at the King Of The Hammers race this year. Budget rig against some of the highest buck rock crawlers in the country.
http://naxja.org/forum/showthread.php?t=944867
Keep up the good work!