Instead of a lumber floor, I blocked and filled the area? Is this ridiculous? (it's ok to say so, I have a tendency to throw out half-baked ideas) Then I could pour a smooth concrete/earthen floor or flagstone it...and the only lumber would be in the 2nd story deck.
We plan to have the porch wrap around the right side of the house. Most water run-off problems stem from our McMansion neighbors and their top-o-the-hill water eradication methods. They are on our right side (if you're facing the house) so a solid foundation wrapped around would block and re-route their run-off to our gardens. Of course, just a wall would do that too.
Oh, and I found a superb rock company, I think. They're within 30min, and they have an online price list. Only thing is, they specifically state on their site that they offer contractor prices to everyone b/c they have no intention of providing 'customer service'. Which means me-no-picky-brains there
I definitely want the stones we get to be as local as possible. Who knew there were so many kinds of freakin rocks!