Thanks for your post. Not sure of any definitive replacement for our loved NITRO. I suspect there may be a new Dodge SUV as a replacement, designed by Fiat but really not much yet in concrete, and I doubt it will be named a "Nitro". Also it will not be in 2012, but 2013/2014 range. Stay-tuned! I was surprised that a large publication just last week did not even list the Nitro as a vehicle going away in 2011. Once that info is out there in print, I suspect more real info about Nitros replacement will come to light.
P.S. Glad to hear your high mileage Nitro has served you well. Enjoy!
Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options