Ok, I think I have responded to everyone. Whew! Almost time for bed. 3:30AM here in California.
I will leave for the night with a post from our president Chris MacAskill on our own photography forum. He had heard people were worried about customization, and this is what he had to say.
"Sorry, in the crush of things I haven't been able to wade into the forums, but Bonocore tells me people are legitimately concerned about us blowing away their customizations when we go live.
Somewhere in this thread and in the customization forum I've said that I understand the concern because SquareSpace six green-fielded their users and made them start over and Flickr just sprung the new design on their customers. But we're not doing either of those. It's been a whole lot more engineering and we could have shipped a year ago if we made SquareSpace and Flickr's decisions, but we didn't. You'll get a preview button and lots of time to play before you make changes that your customers will see, and we're preserving things like photos, stats, comments, sales reports, etc.
We all know how forums are and those answers get buried fast so please someone who reads this answer the next time the questions come up, because we're working all hours in prep for Tuesday."