This is what three tons (well, 5,900-lbs) of wood looks like in my backyard.
The wood for the deck was delivered yesterday and the project is now, I s'pose, officially underway.
We ordered Southern Yellow Pine pressure-treated (MCA) and Cumaru from AdvantageLumber.com ... when doing the math, it was (sadly) cheaper to buy and ship the wood — even PT — across the country than to buy locally. The Cumaru was easily available in a hefty 5/4 board thickness which will hopefully prevent cupping a bit — it's similar to Ipe, but a a much lower cost and is a bit lighter in tone. The Southern Yellow Pine is a stronger wood than is available locally and the treatment is less corrosive, so it should make for a stronger foundation overall.
We'll, of course, keep you updated as to the progress along the way.