i see many host/people here use mostly LAMP based billing software. i'm wondering if people would be interest in a ASP.net/IIS/MS SQL based billing software or if anyone can point me to an existing ASP.net/IIS/MS SQL based Web hosting billing software.

Considering how easy it is for PHP to run on Windows, I think this is the wrong place to ask. :)

http://dotnetinvoice.com
and Yes, I would like to see a few more .Net options.