downloading the craftcoinish jar and dumping it in the plugins folder, seems to cause the server to hang and not load. Gets stuck at 83% chain download.
Hey, sorry I missed this question...
The craftcoinish plugin has not been updated since pre-fork. It does not work correctly. Unfortunately I have no control over that project, and cannot attempt to correct the issue.
That being said, most server ops are using an economy like this one
http://dev.bukkit.org/bukkit-plugins/boseconomy/ it is quite simple to configure that plugin to use CRC on your server using the config file. Look at smp1.spendlitecoins.com for an example of a successful minecraft economy using CRC.
Hope this helps