You know how toyota has TRD (Toyota Racing Division) that offers bolt on superchargers for their toyota trucks? That'd be pretty damn sweet. And they offer a warranty through toyota on it, maybe a program like that for jeep, that'd be real sweet, and just another thing to generate a little revenue with!
Maybe adapt the MDS system from the chrysler 300C to the SRT8? I've never owned a SRT8 but I do have a 300C, and the MDS is a nice feature for fuel savings.
Also, I have a lot of female friends that drive luxury SUV's just because they're deemed "safer". Why are they called "safer"? Because they have three cameras. One on the front, one on the rear, one under the sideview mirror for curbside view. These cameras also incorporate proximity sensors. This shouldn't be standard, but it should be an option. Hell, when your stock wheels cost a couple thousand, im sure people wouldnt mind paying a little bit extra for a camera to help 'em while parking. And if you add that hitch, imagine how much easier it would be to hook up the hitch to something with a rear view camera. And the front view camera pretty much speaks for itself.
Another cool feature I've seen on the highend lexus trucks (the 570 series) is when you open the door, there's an illuminated door sill that says LEXUS .. perhaps one that says SRT8? A weird little thing, but it'd definitely be a cool add-on.
another random tidbit, my 300C has a feature in the EVIC, its like an easter egg that you can unlock and it tells you 0-60 times, and a buncha cool stuff, perhaps an evic easteregg for the srt8 wk2?
also this may sound cheesey, but why not just do a hitch package as an option, and also do side exit exhaust (slot style) as an option. You can pick the exhaust option independently but when you choose the towing package you have to get the side exit exhaust and you get a standard style hitch in the back with a body colored ABS hitch cover. If done right, that could look pretty sweet.