A new patch has been released to update NFS Undercover to version 1.0.1.18. Two versions can be downloaded from here: EU and French/German/Italian. List of changes:

"This patch introduces the new Challenge Mode. Compete in 60 new unique events spread across ten game modes including favourites such as Sprint, Outrun, Circuit and some new game modes including Highway Wars and Highway Checkpoint.
Challenge Mode includes the chance to win and race three new Reward Cars particularly the Battle Machine from Pro Street. These Reward Cars can be used online or offline so are great for showing just how good you are at Undercover."