Steven,
I'd wait for about a week before getting water. Just to be sure that all of the runoff has cleared the coast.
that's just me though.
jarhead,
Your right. I noticed a improvment in my tank after only a few waterchanges with NSW. I was using IO before and even tried oceanic as well. When I used those salt mixes w/ RO/DI water it would take a day or two for my corals to open back up and look "normal" again. After I switched to NSW, it now only takes a few hours, and I don't even match the temp as much as I should.
I also noticed that after a water change w/ NSW, my skimmer quits producing foam for about a day. Also my LPS corals seem to open up more as well as my other corals just look better. HMM, must be a good thing.
There are some old pic's in my gallery. I need to update them with some new ones now as the tank looks even more different than when those were taken.