Anna Elliott is the author of Twilight of Avalon, which I read and reviewed last month, and I've found a recent interview she did at The Burton Review. Actually, it's a guest post, much like she did at Historical Tapestry when the book first came out.
Most of the post discusses the background for Twilight of Avalon, it's inspirations, and the setting of fifth century Britain. There are also some interesting hints for the events of the next book, Dark Moon of Avalon (I think that's the title, anyway).
Given that I absolutely loved Anna Elliott's book, I found this to be a very interesting post with some good points on the ever-growing legend of King Arthur. If you're a fan of Arthurian literature, check it out (and perhaps check out the book as well).