Not sure about Webber leaving all together mind, its definitely make or break again this season and for how the first two races have been its definitely going break but later in the season i can definitely see Webber aiming for his title shot!
Again make or break for Massa, if he wants to stay in F1 he'll have to compete with Alonso's pace, it'll be a shame if he retires into a poor team as Schumacers failed apprentice at Ferrari.
If the Sauber team pull there socks up and develop a quick car they will definitely be the title fight if they can hold onto there drivers!
Rosburg in my opinion is way over-rated!!! He's now been in F1 long enough and hasnt ever shown great tallent in overtaking or defending

he would be an ideal replacement for Massa at Ferrari. Always a good points scorer but never a real risk taker
Mclaren seem pretty set in stone at the moment, cant see that changing for a while! Ideal team at the thou!
I still think Schumacer is going to be a race winner mich mercades soon! He hasnt been as he was but you cant forget he has 7 world championships under his belt!!!