Thanks for this great plugin and good to see you are recognizing the need for it.
I have 1 important question though.
Currently there is an alternative to your plugin which seems to offer everything identical to yourself but with 1 distinct difference. There plugin supports single login and signing details so customers can comment on wordpress posts or the more relevant bit for me is the need for using bbpress without needing another login.
Here is the link to other plugin http://www.zingiri.com/whmcs-bridge/
If you could tell me whether this is currently possible and if not whether its a planned feature.