My first reaction is too bad, another car we will never see....I want to think (no pun) GM is trying really hard to insure some plug ins' get to market, I have this gut feeling they are trying to suppress them with all their (diminshing) might.
I don't hate GM, In fact I wish them all the best in getting these produts to market but, I don't like their green track record in producing minor gains, lots of hype and LOTs of advertising how green they are with no product to back it up.