I built the entire wall myself, with the exception of the wooden frame that holds it up, which was Mark's contribution. Many of the plants in the wall were ones I started from cuttings.
Since the area is heavily shaded, the wall is comprised of lots of fuchsias, ferns, and tender vines or creeping ground covers. The black things sticking out at the top are misters that are part of the plumbed drip watering system, which waters the wall for 4 minutes every 6 hours. With living walls it's important not to let them dry out, since the felt medium acts as a soil substitute but doesn't hold water in the same way that a deep planter full of soil does. If you'd like to learn how the wall was constructed, read on.
Below is what the area looked like before; a plain, painted sheet of plywood attached to the back of our neighbor's fence. To this we attached the wooden support frame that Mark built.
Meanwhile, I assembled the materials:
Left to right: industrial grade 1/4" thick recycled felt, rust-proof staples, landscaping fabric. Click each photo for source.
The next step was to attach sheets of corrugated plastic to the frame so as to create a waterproof barrier. Once the frame was completely covered, I caulked the seams to prevent water from seeping through.
I also added a second layer of landscaping fabric in between the layers of felt, which, if I had it to do over again, I would not repeat. The plants go behind the top layer of felt and the landscape fabric, and in front of the bottom layer of felt. However, the fabric has no stretch to it and had to be cut much larger than the slits in the felt in order to accommodate the plants. It was a huge pain in the ass, and I definitely would not recommend using it for anything but behind both layers of felt as a moisture barrier, if at all.
DIY Greenwalls (the source of most of my information)
Sunset magazine article
Tumbleweed Traveler -- Uprooted Garden
Living Walls and Vertical Gardens