Upvote for comments
Can not be easily currently implemented because questions and answers are custom posts, but comments are wp comments. That would require different code base.
I totally support idea of having comments as first class citizens, being able to vote for them, have them count in profiles etc. Easiest way to do it, overall, would be to make comments custom post types too.
Anyhow, this is a great idea, I’m with you on that.
Me too.
What do you think @Rahul?