Today saw the debut of a couple more new Formula One cars for the 2007 season.
BMW officially launched their new car at Valencia today,

while over at Jerez the new Renault made its on-track debut, although the official launch isn’t scheduled until the 24th January.

also on track was a Williams with a new paint scheme and a dramatically revised front wing treatment.

[...] Although it has already been seen on track, the 2007 Renault F1 car was officially launched this week with a new orange color scheme. [...]