Patricia Briggs posted the cover of the next book in the Mercy Thompson series on her site. Nice ass huh. This will be out January 08.
She also says on her website that there will be a total of 7 books in this series to be released in Jan/Feb of each year. Also there is another series starting in the same world following characters in the "Alpha and Omega" story that was is in the anthology "On the Prowl". Three books have been proposed: to be released in July-ish of each year, so a new Patricia Briggs novel every six months.
Also here is an interesting link – Briggs explaining why many fantasy authors write multi-book stories which I found after my mini-rant on series that go on too long. Still, she talks about trilogies more than anything which is a series length I'm ok with so no disagreements here.
The Mercy Thompson series is one of my auto-buys. Another one is the Cast series by Michelle Sagara West, the Magic series by Ilona Andrews and the Tinker series by Wen Spencer.