I actually coded this vbulletin plugin long time ago, and have published it on VB.org long time ago. But now i want to write on my blog 🙂
This plugin will allow each usergroup to have reputation setting (including reputation power, daily reputation limit, reputation spread limit).
To download it, you can open this link :
http://www.vbulletin.org/forum/showthread.php?t=266604