I think fo_sheezy's talking about the Toyota Fortuner. I actually think it doesn't look that bad and it definitely would "fit" as the next step for a 4Runner. They both have the same downward slanting pilar behind the rear doors unlike the Highlander.
All in all, nobody knows when this next model will show up though. Toyota hasn't given us much to work with. Motortrend magazine seems to think that the 4Runner's next redesign will be for 2009, for whatever that's worth.
http://www.motortrend.com/future/veh...icle_forecast/