This may be kind of dumb, but I'm a facebook user and I kinda like how everything they have on there has a like option where you can express your approval of something.  I always thought message boards are the perfect environment for this.  Instead of replying "I agree" or "+1" or "Preach On"...you can click Like.  It'd be cool to see how certain opinions are being viewed by others, and how many "likes" certain viewpoints get. 

I have never seen this on a message board before, so why not be pioneers?  Sure it is kind of tacky, and would be a complete ripoff of a facebook tool, but I think it'd make the site more interesting.  Wondering if others think it would be cool, and if Ryan thinks it would be a nightmare to add.

It's been on the list for version 3.0 for awhile.  Sadly I just have time to add things to that list and never remove them! 

http://stackoverflow.com/ has something similar so it's been around on message boards, probably before FB so it wouldn't be too tacky.