Here is an interview with King about The Stand in which he also mentions the upcoming Under the Dome. You can also listen to the interview at the same url.
Here is a question about the upcoming Under the Dome from King's official site, with an answer from King himslef:
Question:
In his book The Art of Darkness, Douglas Winter quotes King as saying "I worked on a book called The Cannibals–I had started it five years before, but it was called Under the Dome then. It didn't get finished either time." So according to this quote The Cannibals and Under the Dome are the same book, or more precisely two attempts to write the same story. However SK's comments in the introduction to Blaze suggest that these are two different books. Could you please clarify this, Ms. Mod?
Here's Steve's response:
Those stories were two very different attempts to utilize the same idea, which concerns itself with how people behave when they are cut off from the society they've always belonged to. Also, my memory of THE CANNIBALS is that it, like NEEDFUL THINGS, was a kind of social comedy. The new UNDER THE DOME is played dead straight.
Here are more info about Under the Dome:
According to King at his reading on Book TV on C-SPAN 2 (taped back on the same day as the 3 Kings event), the long novel he's working on is... Under the Dome!
He said something along the lines of "I tried to write this 25 years ago...The idea stuck with me..." He again called it a very long novel. He then read the first few pages, about a woman getting a flying lesson and an old woodchuck walking along a road. The reading will be aired again on Saturday, May 17, at 8:00 AM if anyone is interested.
Here is what Rocky Wood wrote in SKUU about this manuscript:
The Cannibals is a novel of about 450 pages, rewritten in July to December 1981. Douglas Winter quotes King as saying that after writing It: "I worked on a book called The Cannibals I had started it five years before, but it was called Under the Dome then. It didn' get finished either time."
The revision was written during the filming of Creepshow: I've gotten about four-hundred-and-fifty pages done and it is all about these people who are trapped in an apartment building. Worst thing I could think of. And I thought, wouldn't it be funny if they all ended up eating each other? It's very, very bizarre because it's all on one note. And who knows whether it will be published or not.'
In my interview with King earlier this year he talked about “a really long book” and this Sunday during the CSPAN2 airing of Writing Discussion with Stephen, Tabitha, and Owen King he revealed more about it.
In 1983, Stephen King began a book first titled “The Cannibals” which was also known as “Under the Dome”. This book remained unpublished and unfinished. According to Stephen King who appeared on CSPAN2 this evening on the program, “A writing Discussion with Stephen, Tabitha, and Owen King”, the book has come back to life. He read an excerpt from what promises to be a very long novel entitled “Under the Dome”. No publishing date was discussed. It looks like Stephen King is digging into his trunk of long abandoned novels and updating them like he did with Blaze. The short passage that King read dealt with the unexpected death of a small plane pilot and student. In recent interviews, Stephen King has mentioned that he is working on a very long book set in Maine. Stay posted for more updates…