This has got to be exciting for all the employees. I had a dream about showing up for the first day and being gobsmacked with the enormity of the endeavor.
I was employed at a company that went through a long and arduous re-engineering of their work environment, and remember the day that we all showed up to 'claim our space'. Walking around and seeing it all completed was an awesome experience. All the thought that went into the areas for the different groups, and where everything was going to end up. It took a few weeks for the monotony to return, but the time until that happened was amazing. Also amazing was how many people started sniping about who had the better office/view/table/etc.
*SIGH*