There are 3 drivers in contention for the 2006 Williams Cosworth race drive.
Nico Rosberg is generally accepted as the favourite by the paddock at large. Antonio Pizzonia will remain in consideration, but has blotted his copybook with poor performances since Monza. The 3rd driver in contention has not been named, but speculation suggests that it is Anthony Davidson.
Klien is not available, not quite sure how someone worked that one out, he's been confirmed as a RedBull driver for a long time, either as team mate to Coulthard in the Ferrari powerd team, or in the new Squadro Toro Rosso team aka Minardi with rev limited v10 Coworths.
And lastly :p dunno what some people have been smoking but Rosberg looks nothing like Ralf Schumacher. But he is a spitting image of father Keke.