Switch back to software phase I during the full day ... would be my favorite. or have a version of these times set up and fully working just to see how it was :-)
We're very likely to be heavily linked on that day from Slashdot and potentially other news services. That means we need the Main Page to be as newbie-friendly as possible. I think that "look at the pathetic old configuration" would be a major mistake. Having Wikipedia as the Featured article might be a good way to draw people in.
-- Creidieki