Especially as he and Alonso are good friends, and yes, I can imagine he'd take great satisfaction in playing a role in toppling Vettel's title challenge now.
Before Sepang, I always got the impression that Webber and Vettel got on OK. I mean, they were never great buddies, that was plain to see, but I felt there was a lot of mutual respect. I feel Webber's issue has always been with the team (them blaming Mark for Istanbul, and gifting Vettel Webber's front wing at Silverstone after Vettel's side of the garage broke their own). Clearly if there ever was much respect between them then it's blown now.
So long as Mark is in F1, he'll certainly remember that.
And huge credit for going against the team with his comments such as "he'll get protection", as we all thought that was what going to happen. Horner's and Marko's faces were a picture during the podium interviews.
It's a shame there aren't more Webbers in the sport, willing to kick the **** out of the PR line and just saying it as they see it. Still, it's better now than it was last decade, when everything in F1 was "the team", and everything in American motorsport was "I'd like to thank [insert long line of sponsors]". The drivers tend to speak their minds a little more now.