LogOres: a more sophisticated x-ray hack detector. Some neat features. It does some basic crunching on ore finds, figuring out average distance between finds, average time between finds, and some other things. Legit ore finds tend to be on the same plane, fairly widely spaced in time and space. Xray hackers tend to be closely placed, and on more varying Y axis.
http://forums.bukkit.org/threads/sec-admin-logores-v0-7-log-ores-to-look-for-cheaters-1000.25432/
Interesting stuff.