The functions requested by Ben make a lot of sense to me.
Rather than adding the first (automatically sending when saved to a folder) as a function though may I suggest this could be more easily provided by Camerabits producing Mac and Windows compatible scripts that can be attached to a folder, with brief instructions on how to customise the script for each user (eg "Change this to your settings" marked in a different colour) The script would then be activated to use PhotoMechanics ftp function when a file is dropped into this. Up until Apple stuffed up Mail I had on here a set of scripts that carried out this function for emails. Folders for each client had a personalised script attached. Although I cobbled them together myself lack of scripting knowledge made it difficult to replicate the action for ftp due to writing the correct paths. I am guessing this would be even more difficult with Photo Mechanic as the software has so many functions. I believe that one of the ftp software producers do already offer a similar script for their own product so hopefully this is something you will be able to add.
Brendan, may I suggest that rather than using Photo Mechanic to send to multiple clients you look into having a program written which allows you to upload once to a server and then it automatically sends to all your selected clients. I admit I am lucky in having a friend who is an IT whiz and who recently wrote a programme (initially in his lunchbreak !!) which allows me to do precisely this. (Previously the script I mention above was used for creating and sending multiple emails. The system though was time consuming, expensive and impractical when competing against the big agencies.) Yes, with my program I have to action the final transmission but as the operating pages are very small file wise I can operate this quickly via a mobile phone and it removes the problem of slowed or dropped transmission, any time lost is more than saved with the cutting of the inital transmission times (transmission time from the host server is a fraction of that when sending individually) and all publications are getting the pictures at pretty much the same time. The script even allows for sending via email or ftp, resending images and, presetting destinations (eg daily newspapers, sunday newspapers, all etc). I am sure you could have such a program customised even more to your specific needs. Unfortunately I can't let you have the script or the developers name because of his own work obligations but hopefully this may be an alternative that you feel is worth investigating.