I saw today that the BizTalk 2010 certification details were posted at http://www.microsoft.com/learning/en/us/exam.aspx?ID=70-595&Locale=en-us#tab2. According to the article the exam will be available at the very end of March 2011. I know many people in the BizTalk community have been eager for another BizTalk certification test so the good news for everyone is that Microsoft listened and made this new exam. Good luck everybody!
Sorry for such a short post, I could have worked it into a tweet. Thanks
MS Innovations Blog 
And we are live! The exam switched over to being live today, on schedule. I checked at the Prometric regisration site and it has the BizTalk certification in the list of exams you can register for. Enjoy!