Compass calibration is basically doing a series of slow circles in a parking lot, clear area, etc.
For cleaning/beautifying the interior, I use Turtle Wax Ice interior care. Basically can go on all plastics, even the dash lens(make sure its clean when you put it on any lens). It basically is low sheen, doesn't make a glare, and doesn't attract dust. For the exterior (mirrors, bumpers, fender flares), I use STP Son of a Gun protectant. I tried Meguiar's, and a few others, but they turn white after time. Armor All had too much sheen, attracted dust (for me), and even sweats on the interior (can see it on the inside of the windshield, like a haze).
No significant changes occured from 2007-2009, but if you can find it listed for a 2008, it will fit fine. Most 2007 will fit, too, but someone may chime in.
Seat covers-touchy subject, read around as some people love em, some hate em, some abuse them, some just look at them. All accross the board, but alot depends on how they will be used.
Pick up a can of Heavy Duty Silicone spray for the gaskets, and you'll stay leak free.
Congrats on the new rig, and Enjoy!
2008 Red Rock Rubicon Unltd 6spd dual top