Both IGN and GameSpot have published new previews of Burnout Paradise. In the IGN preview it is mentioned that everything will be unlocked (or available to unlock) right from the beginning, allowing for players to play the game the way they want to rather than being restricted by the previous method of unlocking events by completing other events.
Other details about the game mentioned include the FreeBurner mode (Paradise's version of Free Roam) will consist of 200+ challenges for example preform a barrel jump or drift competition.
More good news is that the version which IGN got their hands on is said to be "Nearly finished" as opposed to the pre-alpha version which we all saw at this years E3.
Below are new images which accompany the preview along with the links to read both the IGN and GameSpot previews.



Links
IGN Burnout Paradise Preview
GameSpot Preview