Twilight on DVD: Comes out March 21st. Can be pre-ordered on Amazon.com for 22.99 and has special features including deleted scenes and commentary by Robert Pattinson, Catherine Hardwicke, and Kristen Stewart.
Twilight Soundtrack: Personally I love the soundtrack and it introduced me to a lot of good songs. You can usually find it on amazon or at target for about ten dollars.
The Twilight Saga: The Offical Guide: This book isn't out yet and there is no date posted but it has a lot of background on the twilight books and the characters. So if you enjoyed reading about the cullens history you would most likely want to pick this book up when it comes out.
Twilight music jewelry box: An amazon exclusive you can get it at amazon on March 26 for 19.99. I don't know what music it will play but it might be a nice novelty item.
Here are the Twilight books of the series just in case you haven't read them or want to buy them or any reason. They're GREAT!
The Twilight Companion is a book by Lois H. Gresh who has written many other companion books for other popular series. This book goes farther into the legends and myths of Twilight.
The Host is another book written by Stephenie Meyer except this time it's not vampires she's writing about it's a girl who lives in a world where there are only a few humans left who haven't been taken over by a parasite that uses their bodies to live. A listener has told us that it's actually a good read even though it's missing one Mr. Edward Cullen.