I'm having a couple of prototype PCBs made by PCB-Pool and they have an interesting new technique for keeping customers updated with progress on their board: as each stage is reached one gets an email showing how one can see details of the board production process. Here is the latest missive:
"We have prepared a graphic illustration of the production stages Tin Strip of your PCB for you."
"To view the current status of your order, please log in to the "My Orders" section on our website. Here you can click on the link, "Order Tracking", and choose the desired order."
"In the Information section of the order tracking area you will see a small thumbnail of your circuit board. Clicking on this picture opens a new window containing a detailed shot of your PCB, scanned with a resolution of 300dpi."
The first one showed the photoplots for the top and bottom copper and the top and bottom solder mask. That was useful, as I'd mistakenly specified identical solder mask on both sides; I could see that they had sorted it out for me, saving me having to contact them about it.
It would be nice if other PCB suppliers did this, as well.