I get a hit almost weekly on the following google search:
"When is the next JR Ward book due out?"
So, just for you, the answer is:
October 7, 2008 is the due date for The Black Dagger Brotherhood: An Insider's Guide.
It's expected to include a short story about the birth of Zsadist and Bella's child; an "interview" between JR Ward and Tohr and Wellsie dated from a few week's before the end of Lover Awakened; and a sneak peek at...
Lover Avenged, Rehvenge's story, to be released in May of 2009.
In between, Ward is contributing a novella to the anthology Dead After Dark, along with Sherrilyn Kenyon, Susan Squires, and Dianna Love.
If you need a vampire fix in the meantime, you can 1) search this blog on the tag "vampires;" 2)Check out everyone's favorite vampire blog or 3) check any of the book lover links in my sidebar -- pretty sure there are vamps to be found in all of those.
Hope that helps!