Hi
I've just released a tool to allow you to check/retrieve/generate your counterwallet bitcoin addresses/keys using your counterwallet 12 word passphrase. The script runs client side only (in your browser using javascript). No keys, passphrases are transmitted server side. For additional security the script can also be run while in offline/disconnected mode
The tool can be accessed at https://blockscan.com/tool_generatekey. Because it is built purely with javascript and html, all of the code is viewable online.