I tend to lean toward specific author websites more. I love
Gaelen Foley's site. She has a lot of information about her books, resourses for people who are looking to break into writing historicals and/or just want to know more about the time period. And she also just has links to a lot of interesting websites.
Lisa Kleypas is another one. She posts a lot of her own thoughts on her books and it's really interesting to read where she came up with a lot of her ideas, why she wrote about a particular subject, or just her thoughts. The little video clips and the quiz she has up are cute, too. XD