Basically, in the forums, where it has all the smilies, it should also have a thumbs up Thumbs up would stand as when someone post an idea, a lot of us will go "+1" and thumbs up would be convenient. It would be a little icon like , or maybe an arrow pointing up with a + next to it, +^
Little confusing but I think you guys get the idea

This is something we want to do for a long time now.

Approved, medium priority