Sorry for coming off as a dink, I guess we agree to disagree.
As for airdams and such, I've wondered why front skids haven't caught on with Wranglers. There are a few for XJ's, and I have an older Land Rover magazine from Europe, it seems every rig in there has a tie rod skid that would double as an airdam.
Tomken does make a small one for the TJ's, one guy on a Jeep forum claimed a slight increase in gas mileage, although I don't remember him quantifying it.
http://www.tomken.com/detail.php?id=107
A nice custom made one
I like it, but am afraid out here wheeling rocks I'd get hung up and rip the dang thing off trying to back out.
And I haven't head much about it, but at one time a few years back a manufacturer built a TJ with the front of the hood dropped something like 3" for better visability. There was talk about a kit to lower the radiator support/grill and throwing on this custom hood, but I've never heard anything since. That would help aerodynamics some.
For the most part I accept that I drive a brick, and therefor don't drive it very much (just for fun really). In fact, my last fill up in the garage here is shown from over 2 months ago, and that really was the last time I filled up the Jeep. Aero mods or not, I drive a brick with drivetrain that was standard 40 years ago.