Its a simple mod that allows someone to thank a user for there useful post. I have seen it used on other forums very well, and i suggest it here to cut down on three pages of thank you posts that follow every chapters release. I would post the link were the mod could be found, but im on my wii right now, so ill edit it in later. Hower it is easily found on google when you type thank you system or thanks mod in the search field
http://www.vbulletin.org/forum/showthread.php?t=122944
example