Delta wing allegedly coming out next week and looky here, we got Dallara images. These are, as far as I can tell, legit images of the Dallara concept cars for 2012. Giddy up. Also, read Super Dave Lewandowsky's entry on the league's criteria for a new chasis HERE.
UPDATE: My boy Roy Hobbson of SilentPagoda.com has more angles of each car. Check it HERE.