I dont know if anyone thought about it yet.
But I think that adding a "thanks button" feature to the forums would be good.
Many posters get disapointed if they post lots of images, but noone replies.
More users will push a "thanks" button than write a reply.
That way the original poster will see that his work is actually appreciated.
In my opinion, many threads would benefit from the thanks button because that way, the amount of one-word-posts would decrease and make threads nicer to read.
Just a suggestion.