Another forum I frequent has what I think is a great space/time saver. The general idea is that each post has a quote button, etc., AND a "thanks" button. Hitting the "thanks" button puts adds the user's name to a list of other users who have thanked the original poster. This lets the poster know that people have acknowledged the post......much simpler and much less space used. Here's an example (you'll need to open it to see the pertinent part):