My iPod has been more or less permanently occupying the original dash outlet. I've added three more: one in the dash above the tray/below the wiper switch which typically is for my cell phone charger. I added two lighter sockets on the console; originally one was actually a lighter for my cigarettes and the other is used for a 12 volt DC/120 volt AC inverter for my laptop computer on long road trips. I almost never use the rear outlet, though I do have a handheld corded trouble light in the event I ever need to change a tire in the dark. I will also probably end up using the one cigarette lighter socket on the console for a portable cooler/heater at some point.
Sorry, but I don't have any pics or install tips, except to say that anyone with 12 volt DC skills can do these pretty easily. I recall using a tap-a-fuse to get power from the fuse block, and that all the outlets I added are always powered; not subject to the ignition being "on". There are many photo how-to's in here though -- even some stickies if I'm not mistaken.
I guess I'm very low tech. All I have is the one outlet (LX has only one up front), and all we ever plug in is the cell phone. Even with a few multi-week camping trips, that's all we ever really needed the outlets for.
I added three in the console. One is for my phone, one for the gps. The dash one is used for the ipod. The third in the console is for a passenger, or to recharge my bluetooth, but frankly I don't use it much. The others I use because my ipod is old and the battery is shot, so it is always plugged in, almost ditto with the phone.
I have not modded, but I have a portable charging station that has 3 12v outlets and one 12v plug. I plug my jabra charger, my wifes blackberry, my blackberry, or our ipods into the jacks as necessary.
iPod, GPS, Blackberry, Droid, wife's and kids' cell phones. Anything that's running low really.
By the way, I highly recommend iGo iTips car charger and adapter plugs to keep the number of cables down.