They've gone for rear tires on the front as well (in terms of width), a la Acura ARX-02, that's why the front wheelarches are so incredibly wide. In any case, looks pretty menacing, on first impression just a very tiny bit like a R15 with a roof. Shame about the fin, but that'll take some getting used-to.
So... until both cars hit the track, I don't know what else there is to say except for speculation and assumptions. All I can say is... Le Mans 2010, Audi vs. Peugeot, round 5... bring it on, baby! Especially since both teams will most likely keep the same driver trios from last year (Audi - officially confirmed, Peugeot - unoficially confirmed by the team manager soon after LM).