I just love fresh salmon on the grill. The other day I picked up these cedar smoking planks and thought I'd give them a try.
If you are going to use cedar planks, make sure you buy filets that will fit on them - the planks I had were square and about 7 inches on a side.
Also, the directions will say to soak the planks for at least one hour - I'm going to experiment with this more, because I bet you could go without soaking these on an indirect setup below 400 degrees dome and not be in danger of catching them on fire. For this cook, I soaked them for about 1.5 hours and didn't get quite enough smoke off them for my taste (following my theory that a soaked piece of wood will evolve water vapor before it gives off the aromatic volatile organic compounds).