Improving GitHub code review
eng.rightscale.com
eng.rightscale.com
I agree that having something like Gitique or (even small parts of) Reviewable built right into GitHub would be ideal. My impression, though, is that GitHub is constrained by legacy data structures and assumptions, and lacks the motivation to overcome this because the tool works fine for their workflow.
We work to cover the whole code review experience with our business rules engine and Early warning system.