For WotL fans, Archaemic has made a patch perfect for you! His extensive ASM research has allowed him to remove WotL's annoying slowdown. Currently, the patch is mostly stable, although some people have had some issues with it which are being smoothed out with each update. He is also trying a new soft patching method which won't require you to constantly patch your ISO. More testing is always appreciated, so be sure to check out his topic here:
http://ffhacktics.com/smf/index.php?topic=8490.0
Be sure to thank him for his hard work. This is something we've all wanted for years now!