Book 9 Called Destined will be released in November 2011. I just finished the last book in the series House of Night. She does have another book regrading the fencing instructor that is coming out in July 2011.
Yes you can pre-order Destined. I just started reading this series and loved it. I gave the books I have read to my mom and she loves it too. If you want to pre-order Destined here's the link. Sadly it's not out til Oct 25, 2011. I know the pic of the book says Nov 8 but it says the book will be released on Oct 25 when you order it. I'm guessing they uped the date which I'm glad.