While I myself have yet to read Eragon beyond chapter 3 (either in book or audio form) (conclude what you will about that), I am very interested in the film, because I heart Jeremy Irons.
I was first introduced to Jeremy by Brideshead Revisited, which inspired me to read the book and become a lifelong fan of Evelyn Waugh. The love of JeremyIrons (he's one of those both names makes his name type of guy) grew with Reversal of Fortunes. And he was just perfect as Dudley in the most recent Elizabeth miniseries on HBO.
More info at Fuse # 8 on the upcoming film.
(And please don't be jealous, Luke!)