This might already be a thing, but if there was any plugin that would decrypt the .dat files in the "players" folder that would show statistics of the player (ex. time spent on server) that would be great.
armorlord4 There are plugins that will store certain parts of it in their own configs http://www.minecraftforum.net/topic/840677-nbtexplorer-nbt-editor-for-windows-and-mac/