Probably, New Line Cinema is working on putting the movie together.
Yes, there is a Hobbit film out. It is quite good actually...
december 2013
Though the date is subject to change, The Hobbit is scheduled for a December 2011 release.
Yes, the Desolation of Smaug
No, the third movie concluded the Hobbit movie series. The events at the very end of the Hobbit, lead on to the events of the beginning of the Lord of the Rings trilogy.
As of now, actor Ian McKellan is planning to play the role of Gandalf in the film version of The Hobbit.
Gandalf
The trailer for the film 'The Hobbit' will be released tomorrow, December 21. At 10:00 PM ET, there will be a live stream of the first trailer.
There already was in 1977. Another one comes in 2011/2012.
The book actually came out in 1937 so it is a film of the book (by Tolkein).
The book was released in 1937. The Hobbit film is to be split into two parts, the first is currently scheduled to be released at Christmas 2012, and the second at Christmas 2013.
Sir Peter Jackson