Description
My goal: To provide a calling card service where customer can recharge their account online.

My current sitation:

I currently have a server setup running asterisk 1.6 and a2billing 1.6. Both software are working solidly. I have also installed Joomla as the CMS for be used for my company website. I enjoy the flexibility and extensibility of Joomla but do not like the look for the A2Billing user interface. I would like something simpler and easier for the user to use. Only a few features of a2billing is needed.

What I want:

1) User Registation Process: Integrate the user registration process of Joomla with A2Billing. When a user signs up through Joomla, an account is also created for them on A2Billing. The accounts between the two database are linked by the user's email address. Can be accomplished by creating a plugin for JFusion (http://www.jfusion.org/) and then use JFusion to send SOAP message to a2billing's SOAP server to create a new card number with the user's email address. Direct injection into a2billing's database is also possible. User sync using JFusion would be a great feature.

2) User Interface: When a user logs into his account, he can see his account balance. He should be able to see CallerIDs linked to his account. He should be able to add new CallerIDs to his account. He should be able to add funds to his account with PayPal, Credit Card (maybe through Authorize.net payment service) and (optionally) Google Checkout. The customer should be able to see his payment history and call history (maybe just last 10 calls). Lastly, the customer should be able to retrieve his SIP settings found in a2billing. I would like this to be implemented through a Joomla component and maybe modules to show the customer's balance.

Essentially I would like something similar to http://www.vinatouch.com (click the link on the top right for English).

Knowledge of the follow is essential:

PHP
Joomla
MySQL
SOAP