MyBB Community Forums

Can one use the existing plugin for myBB 1.8 or does it need to be modified first?  If the latter, are there plans to upgrade the plugin for 1.8?

http://mods.mybb.com/view/index-top-posters-2

you can try changing the compatibility and see if it works...

alternately, you can use of these similar plugins: http://community.mybb.com/mods.php?action=view&pid=269
http://community.mybb.com/mods.php?action=view&pid=59