You might be able to run a PHP script inside of a webviewer that allows for upload, and writes to filemaker via CWP.
However that's purely theoretical.
Another option would be to have filemaker open an email, have the user manually insert the image into the email, and send it. On the backend you would have a copy of some POP plugin (EG POP3It or 360works mail), that receives the email, reads the ID from the email, and then writes the attachment to filemaker.
I am highly interested if you do find a solution for this.
that 2nd option is a very interesting concept and one that could be sold as an actual advantage.
A link from the portal to "email supporting docs" would be good..
Food for thought... let me play around with this and I will post any solution here..
thanks for this., super idea..
Sure, I might be interested in collaborating offline for this, send me a message if you want to have a quick gotomeeting sometime.