[Royal Tiger]

Red Bull will buy out Minardi and have 4 cars on the grid next year. They announced the Red Bull Team will stay intact, and the new team is the "rookie" team with possibly Scott Speed in one car. They will compete against each other, possibly with independant sponsorship.
Second, Toyota is in talks with Bridgestone to switch to them from Michelin next year.
And this isn't new, but Sauber is gone at the end of the year if you didn't hear. It now is the factory BMW team. No word on who Williams will be buying engines from.