Could, but then we have a screen width issue.
What I'd rather see is something in one of the bottom corners (say, the right, though we'll need to make sure it plays well with the update notifications). Something the size of a tooltip, perhaps, that just says "4 people are reviewing this change." or something.
However, again, it may not be useful enough to persist on the screen. I'd like to know what other people think there. It could just be a small, thin banner sitting right above the review request box.
chipx86:
And yes, I know that the thumbnail is broken :( Looking into it.