Eragon 4 release date?

i would like to know when the Eragon series book 4 is coming out!!!Eragon 4 release date?
So far there has been a two to three year gap in between the publications of the Inheritance books. The name or an estimated release date for the fourth book has yet to be released. Paolini has stated that he came up with about 100 pages of the fourth book while writing Brisingr, so this may possibly speed up the process to some degree.Eragon 4 release date?
....I thought it was the Inheritance Trilogy....?



So I guess that means I have no idea since I was clueless to the fact that Paolini was even planning to go beyond three.Eragon 4 release date?
it should be finished in mid-2009 or early 2010.