Damn, that sucks.
2008 with over 59K miles on my engine and no leaks yet, thankfully. I hope for your sake it's not a block issue. Head gasket would be bad, but not horrible. Either way it's almost certainly covered under your warranty.
But don't delay or fool around. Your warranty is already two years old, likely your dealer is trying to run out the clock on it so he can sock you with thousands in repair bills. If necessary call your lawyer in on it, and go to another certified Jeep dealer if you can. Some dealers are owned by ripoff artists, some are owned by honest people. Sounds like yours might be the former. Don't be afraid to find another, they are all legally obligated to honor any Jeep Warranty.