I am the new owner of DotNetInvoice. I have since contacted Anand and have answered his questions.
I have just released v2.1 of DotNetInvoice, including many bug fixes and 10 new features. If you are looking for a pure ASP.NET / SQL Server / AJAX billing and invoicing solution, including recurring invoicing utilizing PayPal or Authorize.NET, check out www.dotnetinvoice.com. Feel free to drop me a line at [email protected] if you have any questions.
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Rob Walling
ASP.NET MVP
www.softwarebyrob.com