Journalist, Lev Grossman makes many on target observations about the Twilight series and Meyer's writing.
Meyer's books are full of gusting emotions. Bella never stops gasping and swooning and passing out and waking up screaming from nightmares. Her heart is always either pounding or stopping. (Bella's histrionics don't feel at all unrealistic. When you're writing about adolescents, melodrama and realism are the same thing.)
...and this bit...
There's no literary term for the quality Twilight and Harry Potter (and The Lord of the Rings) share, but you know it when you see it: their worlds have a freestanding internal integrity that makes you feel as if you should be able to buy real estate there
Her next book Breaking Dawn, will be out in August, 2008.
oh, as a personal aside:
Can the copy writers and headline thinker-uppers pu-leeeze STOP writing headlines like "Is [insert name of author here] the next J.K. Rowling?"