If you go onto Richelle Mead's website...it says that the fourth book is called Blood Promise and it's released August 2009.

I was going to post the same thing but it doesn't look like the owner is keeping up with the site since it was opened. I heard that maybe it's not August but perhaps earlier like July.

Yup! Richelle said she's gonna work like crazy to get it out in July.
Honestly, I can't WAIT! xD;
Poor Dimitri... hopefully Mason was lying when he said he was already Strigoi.
<.<; But I have a feeling he wasn't.

i wish richelle could release it earlier, 6 months is already taking so long,

I'm so happy it got moved up but when i go on amazon.com it still says august ::tear::
. . .
anyway anyone got any theories for this book i have a ton and i would love to hear others?

the other thread under this book has a listing.

Richelle just said on her LiveJournal that July isn't the accurate month of release. It's actually in Aug 20. Arghh.. have to wait so long.. I thought I can have Harry Potter movie to watch and Blood Promise to read for July.. Now it seems that having both together is simply impossible..