Well first off, it would be great to see the Popularity Contest plugin work for 2.5+
Secondly though, it would be awesome, for multi-user blogs, to allow for admin dashboard widgets to see which of your posts are getting the most traffic, which ones aren't doing well, and even some other features.
I think this actually has a ton of SEO Value too, because it lets you know what is doing well, maybe keyword wise, and what isn't doing so well.
