They also put up a website with all the features. View it here.We recieved a mail from EA today with a list of the Online Multiplayer Features for the PS2 version of NFS:Underground. These features will most likely be the same for the PC.
The list shows, for example, that you will be able to play online with your own modified car, and that your car will appear the way you modified it for other players aswell.
NFS Underground Multiplayer
NFS Underground Multiplayer
Our affiliate, ND4SPDWorld got word from EA about the multiplayer features in NFSU: