I kind of agree with ISLAMATRON, I think the Honda affair has somewhat traumatized us. Like a few said already, the end of F1 is anounced every two years... If we rely on internet forums, Toyota should be memory since it's third season, and Renault has so little commitment in F1 that it is gone for sure, every year

.
Williams is living in the deep red for a few years, this is no secret. Certainly the hesitating manoevers from sponsors are stressfull, and to know the team is now living on it's future litteraly, is quite ironic, or even poetic I'd say, because this future precisely depends of what the team can realise with that budget.
However,as the saying goes,
"don't sell the bear before killing it".

That team, on par with it's founder, has a very rough and hard skin. I prefer being totalled by the announcement of their withdrawal after the season, than living a whole year shivering and seeing signs of apocalypse everywhere...
I HATE sensational journalism such as Auto Motor und Sport Build and Co, to be honnest.
For now, I strongly believe in Williams, especially Rosberg, although this is the third consecutive season I bet on them with no real success, even while the potential is here, definitly. This time it's different, and the gamble over the Flywheel KERS system should be a good one in terms of exploitation costs, if I understood it correctly, while no one can tell for sure that it won't be as performant as electric KERS, especially for the begining of the season.
Obviously we won't be able to tell before the fourth or fifth race of 2009, in a few month.