Outsourcing Inbound Fax Service?

bergeron76 asks: "Does anyone know of a way to provide a large company with inbound fax capability via email? We're a linux shop and I'd like to be able to have inbound faxes come in as .JPGs via email. I've seen this before I think , but I'd like to know if anyone out there could recommend anything in particular." Anyone out there had luck in sorting out the wheat from the chaff among the many fax-related applications?