I have heard from some that they have received a package at Fedex from Oracle America. It's a good sign that you just got laid off. I have no idea how many have been sent, but can confirm that some sort of layoff is going to happen by Friday. I'd expect a mandatory meeting from your manager or a higher up.
The Fedex package will explain what you will get in severance and when you will get it as well as your medical benefits through cobra while you look for another position over the next 30 days. Piece of advice if you get a package. It's a nice package, but don't waste your time looking internally. I don't know of anyone who landed another position inside Oracle.