After the opening I left and had breakfast and did some shopping. I returned about 2 hours later and they were just finishing up letting people in who were in line and letting everyone else in.
The store is very cool and all the employees were great. I met some new store employees along with some MS employees from Tyson Corner store, AT&T rep and Samsung reps. They had a couple W8 tablets that you can play with and they were giving lessons on W8. They didn't have a WP8
Here's a few pictures i took.
MS Store