I just got an invite to orientation as well, Marina. Don't know if I'm attending..
I went to the Orientation last weekend in Fremont. When I got there, there was a line to get in - like a block long. It took about 15 minutes to check-in. After check-in, the Tesla representative told me I could go inside and listen to the presentation for their cars, solar panels, and battery wall.
I listened to the car presentation for about 5 minutes. It was very very basic. Almost like a sales pitch for buying the car. They tell you how it doesn't use a key, how it has adaptive cruise control, and if you purchase FSD, it has a feature that will summon your car... Really.. If you are in these forums, you will not learn anything new from the presentation.
After the presentation, they had a Q&A, then told everyone to get in line to have their files reviewed by SA's to ensure everything was in order. After another (15) minutes of waiting, I got to the podium and they asked for my reservation number. After giving it, they said, "Oh, it looks like you did everything on-line already. You are all set. We will contact you by text message when you have been matched with a VIN."
I'm not saying don't go to the orientation, but it really isn't necessary if you have filled everything out online that you are supposed to. (It's not like you get bumped up in line to get a VIN assignment just because you attended.) They had gourmet food trucks (not free) at the location, which I love and it was neat to see all of the Tesla models on display. Just don't want you to have super high expectations about what you are going to.... at least in the Bay Area.
I'm still waiting for a VIN assignment like everyone else. It will get here when it gets here... I placed my order on 10/11, MSM, 19" Wheels, Black Interior. I'm hoping before Christmas!