Hi Jeff,
Sorry for late reply as I was quite away for a while.
Btw to answer your question, I have worked on DBM 7 and CRM Integration. There it was not much given by SAP. We have customized the solution.
For DBM 8 I am yet to conclude. Hence unable to answer the question.
One more thing, if you have dealer/sub-dealer network pls have a look at Dealer Portal. You may find many requirements met in DP.
Thanks and Regards,
Pravin