One of the worst impacts I've ever seen in F1. Probably the only bigger head-on impact in recent years was Burti at Spa in 2001 (~180mph into a tyre barrier). I've only seen Kubica's crash once, but I didn't see any protection on the barrier he hit, is that the case? His head didn't look very well restrained, not sure how well the HANS device performed in that one. Hope he makes it out ok without serious injury but it seems unlikely.
edit: Massa and whoever else jumped the red light on pit exit likely to be disqualified too, I imagine.