I think it would be really cool if their was a way you could rates peoples blogs with a thumbs up or down. Then have a part of the main page where highly rated user blog posts will automatically be displayed. The same thing should happen for user reviews and highly active discussion threads.
This is a community driven site in the purest sense so making things like user blogs, reviews, forum posts and discussion etc a key component of the GB experience is very important. On the Bombcast you guys should then discuss what we're all talking about. 1up.com used to do that kind of thing (not so much any more) and it was a big hit with the community.
Just think about it.