so you don't wanna do it this way:
scan-fax-using-camera-phone
I only need to fax stuff out about 6 times a year, so I just have my phone line plugged into the modem in my desk PC, and print-to-fax.
Should I ever have to fax when I'm on the road, I would remote desktop into my desk PC - and to make it easy I'd tether my notebook/laptop to the phone since I usually have it with me.