IMO, i think the VW is finished, or close to it. Why they haven't released it i reckon is because of the LFS physics. I think the devs want/need to fix the damage physics and few other parts before releasing it, so the VW can properly be "advertised" if that makes sense.
I remember when GT3 was released they interviewed the owner of the series and he said he wanted damage in GT3 but back then, not all the car companies were happy with their cars being damaged and driven, which could be bad way to advertise their cars.
Maybe its the same now, VW could have said to LFS, fix a few things and you have the license to release it, we aren't happy with our VW flipping into the sky from a nudge to a wall.
At the same time, maybe not. Maybe the VW isn't finished.
My bet, Christmas patch will be an update with the interiors, physics etc.
Next year early/mid '09 they will finish off s2 with the rest of the features that needs to be done, with the VW.