Well it seems that Hamilton will find out today whether he will be punished for the incident between Vettel and Webber. Looks like it was Toro Rosso boss Tost who alerted the FIA to Hamilton's maneuvers:
Scuderia Toro Rosso team principal contacted the race stewards after seeing a Youtube video of the incident that saw STR's Sebastian Vettel ram into Mark Webber.
- F1-Planet
And if you look at the position of Hamilton's car carefully in this video you have to wonder what Hamilton's car was doing so far back. I mean he was essentially alongside Webber after Webber had already been hit and spun. Seems like Vettel really had no place to go, both sides of the track were occupied. Just saying...
EDIT: Here's a (really low quality) screen grab from that video. You can see Hamilton is still alongside Webber when Webber has already spun, and Vettel is a good chunk behind having driven into the back of Webber.