[Asterisk-biz] What's the best opensource web interface for customer portal

[ihatewindowsxp at gmail.com]

I'm looking for a good web interface for a customer portal for a residential
Voip business.  It should give the customer the ability to set check
voicemail, set call handling options (forwarding, blocking, do not disturb,
etc), check usage, pay bills etc.  I would like it if it were comparable to
the user portal for companies like Broadvoice, Vonage, Voicepulse, or
Sunrocket.

Does anyone know of a good opensource solution for this? Please don't
suggest commercial packages unless they are really cheap (under $500), and
head and shoulders above the opensource solutions.