What is needed is a [only moderately] imaginative person running a commercial flight briefing outfit (Avbrief?) who already has your credit card details (to pay for the fax transmission) and who could do the same thing.
Getting onto a website in an internet cafe is a lot easier than sitting in a hotel in the middle of nowhere trying to fax a FP to Heathrow out of one's laptop with Winfax via a GSM phone..... especially as one needs to go to the said cafe to get onto Avbrief to get the weather, and onto the AIS site to get the Notams.
The other day I was explaining this system to an intelligent but non-flying woman; her first comment was "why isn't there a website where you could enter your route, it checks it for danger areas, restricted areas, stuff like that, then it files the flight plan for you?" Oh well.