Dave
The wall siding is MDF slat wall, with 3" center grooves. Comes in 4' x 8' sheets with various color options including the white that I used. We special-ordered from a local lumber yard - as I recall about $20-25/sheet 3 yrs ago. I simply installed over existing drywall (could also go directly on studs). The hardware is available on-line from dealers specializing in commercial/retail applications (just Google "slat wall") - most hooks, shelf brackets, etc. are anywhere from 25 cents to $1-2, with very heavy duty hangers (I used for chainsaw, disc grinder, etc.) for $5-10 each. Incredible variety of options and MUCH sturdier than pegboard systems - hence the wide commercial applications. The same stuff is used by some "high-end" custom garage storage systems, but for several times more $$$. The white color made for a very bright work area, and is easy to vacuum clean (very helpful in dusty shop environments). My only regret is that I didn't carry the siding all the way to the top of my 12' ceiling. I may yet go back and do that, as I want a safe storage area to "hang" completed components like the empennage.
Fagg