I'm looking too.
So far I've found the Graco Quatro Tour Duo with the Graco Snugride 30
but I've gotten mixed reviews on the stroller so I'm going to go to the store and try it out. The carseat is supposed to be really good though!
i have owned the graco double strollers and i like them. (for indoor use or on paved areas) and you can buy them with a graco carseat or buy it seperately and attach it. (just check walmart target or babys r us sites for travel systems and double strollers)