Use this plugin to track a player's ore mining and watch for possible use of xray cheats. The plugin will track when a player mines stone, coal, iron, gold, lapis lazuli, redstone, diamond, and emerald. Use the "/orewatch show" command to display the mining log for a specific player. The log shows both the number of blocks mined as well as the percentage compared to stone. Look further into players with high percentages as they might be cheating.
The following video is a fun display of the kind of cheaters you can catch using OreWatch.
Only one command at the moment:
/orewatch show [player] - Show an ore mining report for a given player. Following is a sample:

Modify the config.yml file in the plugins/OreWatch folder to specify the ore threshold limits. These limits are used for color coding a player's report. Once the limit is reached, that item will appear in red on the report.
No permissions at this time. The "/orewatch show" command can be executed through the console or by any player in game.
Let me know what additional functionality you would like and I'll add it.