BRSMA  You seem to overlook that your “regular“ phone line might not be so regular anymore. I know more than enough people, including me, who already ditched their regular analogue or ISDN land line and its provider or are in the process of doing so. A broadband internet connection and a mobile are nowadays both sufficient and more economical for many private and professional telecommunication usages.  
(Version 1.0.5)

JIMW  Great idea! Ditch residential phone service for VOIP and count yourself among the dead or dying if you need help via 911 in a natural disaster when cell phone towers are overloaded and servers or overloaded or down. Land line is a proven technology with a history of behavior in times of such disasters. VOIP is not. Land line wile not perfect or absolutely 100% reliable is usually the last to go down and the first to come back. In disaster conditions when I need help I want the best chance to get it with a proven technology that has a history rather than a technology with a brief history of failure that is promoted with empty promises and slick marketing. Yes, I am willing to spend a few extra bucks a month for a proven abet older technology that will give me a better change of saving my life in times of floods, earthquakes, wind damage, or military attack. While VOIP may be great for businesses, I want the most proven technology for me and my families lifeline at home. That technology is copper landline. If you don't believe this, just ask your VOIP provider for statistical and historical data of performance in disaster or emergency conditions and see just how far you get and what they are willing to provide. While VOIP providers would like you to believe that you will have reliable phone service in disaster or emergency conditions, I have yet to see any actual data using real life situations that would back up their claims.   
(Version 1.0.5)

NATHAN FLEISCHER  Why not comment on the actual software, weather and how it works, etc., instead of making a point as to why it isn't necessary? I doubt that does any good for the developer, and seems unwarranted. Also, you fail to see that there are people like me who are not going to use the dongle, as you suggest. I do not have a POTS line, neither will I get one; they are expensive, taxed to the hilt, clogged by telemarketing, etc. I have a fax service, and this product is just the kind of enhancement that I need and appreciate.   
(Version 1.0.6)

::MILE::  Right, like we all have fax machines at home or on the road...!?!  
(Version 1.0)

TCURDT  Could you please be more specific? What did not work for you?  
(Version 1.0)

MAC MAIL  If you could enclose a text file of how to use it. It might save a lot of try to figure it out. At least should mention it only works with pdf file.

Can't even find it in the printer's window.  
(Version 1.0)

TCURDT  Please have a look at the screencast on how to use it.

http://vafer.org/projects/uif2iso4mac/

(Click on it to get the bigger version)

It works from every standard print dialog (Apple+p). Which also means it works with all printable documents.

But yeah ...I will provide a README with the next release.

Thanks for the suggestion.  
(Version 1.0)