Id say chances are Mclaren will try and retain Kimi. The results speak for themselves. Montoya is still a bit on the wild side and makes many bad decisions like trying to pass Villeneuve on the outside on the first lap and getting punted from the race. Other then that nice flat spot which led to the wishbone failure for Kimi only reason he didnt get the drivers title this year was the car let him down a few times.
I also thought I read the Mclaren announced vodafone as their title sponser? Well at least for 07.
I know it seems crazy to announce trading teams a year early but I dont think it will effect how Alonso will drive. Lets face it, a racer is a racer and doesnt like to be passed. I remember that nice US grandprix this year where only bridgestone ran. One of the proposed solutions was to limit the speed of the michelin cars in the last corner. The announcers just laughed. Any racer that is getting passed and know they can go faster to prevent it will