The latest update to MotorStorm is out today.
Now included is a vehicle selection of 2D/3D in the host options as well as mirrored tracks.
The vehicle selections lets you have either the traditional 3D select screen or a 2D grid of the vehicles to choose from, which seems to speed up the selection process somewhat.
The host can also choose mirrored tracks which reverses the entire geometry set of the tracks. Where you went left you will now go right. An interesting mix, and will take some getting used too not to forget which way you're actually going!