Business Desktop Deployment Solution accelerator is now called officially MD (Microsoft Deployment). RC1 RTM was just released.

http://www.microsoft.com/downloads/details.aspx?familyid=3bd8561f-77ac-4400-a0c1-fe871c461a89&displaylang=en&tm

Read more on: http://blogs.technet.com/msdeployment/archive/2007/10/26/download-microsoft-deployment-rc1-from-microsoft-connect-today.aspx.