I just stumbled upon this site, while looking for possible in game currencies, I could use in Minecraft. I found it after finding a plugin called Satoshis, found here http://dev.bukkit.org/server-mods/satoshis/ (hope linkin to other sites, is not again any rule).
So I am here to learn a bit more so I can implement it on my busy Feed the Beast server, to help keep it profitable and pay for the server, as donation's don't pay for 100% of it.
And with that I go by Midnighte.