Like Or Rate Up
Like or Rate Up buttons should be added to everything. Whiteboard comments, comment replies, blogs, everything. I am sure many many times people see something and it's exactly what they were thinking and they don't have anything to add, or maybe some people are shy and would rather just show their approval quietly and move on. Many times in real life a thumbs up alone is a more appreciated/fun response than words. There are so many times I have wanted to like something that doesn't have the like or rate up option available and I have to settle with the boring monotone text response of "I agree" or "me too" or "I sure wish there was a 'like' button here."